diff --git a/README b/README
index 69ca8ad..d0f52b8 100644
--- a/README
+++ b/README
@@ -35,7 +35,7 @@ your memory.
 
 Then add the following to the top of your rc.lua:
 
-  require("vicious")
+  local vicious = require("vicious")
 
 Once you create a widget (a textbox, graph or a progressbar) call
 vicious.register() to register it with Vicious:
@@ -559,3 +559,4 @@ Vicious contributors:
   - Hiltjo Posthuma          <hiltjo codemadness.org>
   - Hagen Schink             <troja84 googlemail.com>
   - Jörg Thalheim            <jthalheim gmail.com>
+  - Arvydas Sidorenko        <asido4 gmail.com>
diff --git a/README.md b/README.md
index 8117b5d..00502f9 100644
--- a/README.md
+++ b/README.md
@@ -36,7 +36,7 @@ your memory.
 Then add the following to the top of your rc.lua:
 
 ```Lua
-require("vicious")
+local vicious = require("vicious")
 ```
 
 Once you create a widget (a textbox, graph or a progressbar) call
@@ -607,4 +607,5 @@ Vicious contributors:
   - Hiltjo Posthuma          <hiltjo codemadness.org>
   - Hagen Schink             <troja84 googlemail.com>
   - Jörg Thalheim            <jthalheim gmail.com>
+  - Arvydas Sidorenko        <asido4 gmail.com>
 
diff --git a/contrib/batacpi.lua b/contrib/batacpi.lua
index 62156fd..fc7d54b 100644
--- a/contrib/batacpi.lua
+++ b/contrib/batacpi.lua
@@ -13,7 +13,8 @@ local string = { match = string.match }
 
 
 -- Batacpi: provides state, charge, and remaining time for all batteries using acpitool
-module("vicious.contrib.batacpi")
+-- vicious.contrib.batacpi
+local batacpi = {}
 
 
 -- {{{ Battery widget type
@@ -48,4 +49,4 @@ local function worker(format)
 end
 -- }}}
 
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })
+return setmetatable(batacpi, { __call = function(_, ...) return worker(...) end })
diff --git a/contrib/batpmu.lua b/contrib/batpmu.lua
index e84295e..8c73d93 100644
--- a/contrib/batpmu.lua
+++ b/contrib/batpmu.lua
@@ -20,7 +20,8 @@ local string = {
 
 
 -- Batpmu: provides state, charge and remaining time for a requested battery using PMU
-module("vicious.contrib.batpmu")
+-- vicious.contrib.batpmu
+local batpmu = {}
 
 
 -- {{{ Battery widget type
@@ -75,4 +76,4 @@ local function worker(format, batid)
 end
 -- }}}
 
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })
+return setmetatable(batpmu, { __call = function(_, ...) return worker(...) end })
diff --git a/contrib/batproc.lua b/contrib/batproc.lua
index dac4d44..8acf005 100644
--- a/contrib/batproc.lua
+++ b/contrib/batproc.lua
@@ -20,7 +20,8 @@ local string = {
 
 
 -- Batproc: provides state, charge, and remaining time for a requested battery using procfs
-module("vicious.contrib.batproc")
+-- vicious.contrib.batproc
+local batproc = {}
 
 
 -- {{{ Battery widget type
@@ -82,4 +83,4 @@ local function worker(format, batid)
 end
 -- }}}
 
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })
+return setmetatable(batproc, { __call = function(_, ...) return worker(...) end })
diff --git a/contrib/dio.lua b/contrib/dio.lua
index 40c4cad..5639bc8 100644
--- a/contrib/dio.lua
+++ b/contrib/dio.lua
@@ -13,7 +13,8 @@ local helpers = require("vicious.helpers")
 
 
 -- Disk I/O: provides I/O statistics for requested storage devices
-module("vicious.contrib.dio")
+-- vicious.contrib.dio
+local dio = {}
 
 
 -- Initialize function tables
@@ -69,4 +70,4 @@ local function worker(format, disk)
 end
 -- }}}
 
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })
+return setmetatable(dio, { __call = function(_, ...) return worker(...) end })
diff --git a/contrib/init.lua b/contrib/init.lua
index 7fee3b3..d30b33d 100644
--- a/contrib/init.lua
+++ b/contrib/init.lua
@@ -10,8 +10,9 @@ local setmetatable = setmetatable
 local wrequire = require("vicious.helpers").wrequire
 
 -- Vicious: widgets for the awesome window manager
-module("vicious.contrib")
+-- vicious.contrib
+local contrib = {}
 -- }}}
 
 -- Load modules at runtime as needed
-setmetatable(_M, { __index = wrequire })
+return setmetatable(contrib, { __index = wrequire })
diff --git a/contrib/mpc.lua b/contrib/mpc.lua
index 8f1f0a9..60974c0 100644
--- a/contrib/mpc.lua
+++ b/contrib/mpc.lua
@@ -14,7 +14,8 @@ local helpers = require("vicious.helpers")
 
 
 -- Mpc: provides the currently playing song in MPD
-module("vicious.contrib.mpc")
+-- vicious.contrib.mpc
+local mpc = {}
 
 
 -- {{{ MPC widget type
@@ -44,4 +45,4 @@ local function worker(format, warg)
 end
 -- }}}
 
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })
+return setmetatable(mpc, { __call = function(_, ...) return worker(...) end })
diff --git a/contrib/net.lua b/contrib/net.lua
index 8f18604..5e6ba93 100644
--- a/contrib/net.lua
+++ b/contrib/net.lua
@@ -17,7 +17,8 @@ local helpers = require("vicious.helpers")
 
 
 -- Net: provides usage statistics for all network interfaces
-module("vicious.contrib.net")
+-- vicious.contrib.net
+local net = {}
 
 
 -- Initialise function tables
@@ -135,4 +136,4 @@ local function worker(format, tignorelist)
 end
 -- }}}
 
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })
+return setmetatable(net, { __call = function(_, ...) return worker(...) end })
diff --git a/contrib/netcfg.lua b/contrib/netcfg.lua
index fc22e8d..f2c0d52 100644
--- a/contrib/netcfg.lua
+++ b/contrib/netcfg.lua
@@ -11,7 +11,8 @@ local table = { insert = table.insert }
 
 
 -- Netcfg: provides active netcfg network profiles
-module("vicious.contrib.netcfg")
+-- vicious.contrib.netcfg
+local netcfg = {}
 
 
 -- {{{ Netcfg widget type
@@ -31,4 +32,4 @@ local function worker(format)
 end
 -- }}}
 
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })
+return setmetatable(netcfg, { __call = function(_, ...) return worker(...) end })
diff --git a/contrib/ossvol.lua b/contrib/ossvol.lua
index eb14cb8..a52316c 100644
--- a/contrib/ossvol.lua
+++ b/contrib/ossvol.lua
@@ -12,7 +12,8 @@ local string = { match = string.match }
 
 
 -- Ossvol: provides volume levels of requested OSS mixers
-module("vicious.contrib.ossvol")
+-- vicious.contrib.ossvol
+local ossvol = {}
 
 
 -- {{{ Volume widget type
@@ -50,4 +51,4 @@ local function worker(format, warg)
 end
 -- }}}
 
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })
+return setmetatable(ossvol, { __call = function(_, ...) return worker(...) end })
diff --git a/contrib/pop.lua b/contrib/pop.lua
index 78e0bcb..0ea041b 100644
--- a/contrib/pop.lua
+++ b/contrib/pop.lua
@@ -19,7 +19,8 @@ end)
 
 
 -- POP: provides the count of new messages in a POP3 mailbox
-module("vicious.contrib.pop")
+-- vicious.contrib.pop
+local pop = {}
 
 
 -- {{{ POP3 count widget type
@@ -51,4 +52,4 @@ local function worker(format, warg)
 end
 -- }}}
 
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })
+return setmetatable(pop, { __call = function(_, ...) return worker(...) end })
diff --git a/contrib/pulse.lua b/contrib/pulse.lua
index 4b0260f..8b3298b 100644
--- a/contrib/pulse.lua
+++ b/contrib/pulse.lua
@@ -24,7 +24,8 @@ local math = {
 
 
 -- Pulse: provides volume levels of requested pulseaudio sinks and methods to change them
-module("vicious.contrib.pulse")
+-- vicious.contrib.pulse
+local pulse = {}
 
 -- {{{ Helper function
 local function pacmd(args)
@@ -79,7 +80,7 @@ end
 -- }}}
 
 -- {{{ Volume control helper
-function add(percent, sink)
+function pulse.add(percent, sink)
     sink = get_sink_name(sink)
     if sink == nil then return end
 
@@ -96,7 +97,7 @@ function add(percent, sink)
     return os.execute(cmd)
 end
 
-function toggle(sink)
+function pulse.toggle(sink)
     sink = get_sink_name(sink)
     if sink == nil then return end
 
@@ -111,4 +112,4 @@ function toggle(sink)
 end
 -- }}}
 
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })
+return setmetatable(pulse, { __call = function(_, ...) return worker(...) end })
diff --git a/contrib/rss.lua b/contrib/rss.lua
index bba1bf2..dcf5cc7 100644
--- a/contrib/rss.lua
+++ b/contrib/rss.lua
@@ -14,7 +14,8 @@ local setmetatable = setmetatable
 
 
 -- RSS: provides latest world news
-module("vicious.contrib.rss")
+-- vicious.contrib.rss
+local rss = {}
 
 
 -- {{{ RSS widget type
@@ -64,4 +65,4 @@ local function worker(format, input)
 end
 -- }}}
 
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })
+return setmetatable(rss, { __call = function(_, ...) return worker(...) end })
diff --git a/contrib/sensors.lua b/contrib/sensors.lua
index 45c7d9a..3ddeb01 100644
--- a/contrib/sensors.lua
+++ b/contrib/sensors.lua
@@ -16,7 +16,8 @@ local string = {
 
 
 -- Sensors: provides access to lm_sensors data
-module("vicious.contrib.sensors")
+-- vicious.contrib.sensors
+local sensors = {}
 
 
 -- {{{ Split helper function
@@ -65,4 +66,4 @@ local function worker(format, warg)
 end
 -- }}}
 
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })
+return setmetatable(sensors, { __call = function(_, ...) return worker(...) end })
diff --git a/helpers.lua b/helpers.lua
index 223c5f1..93a701b 100644
--- a/helpers.lua
+++ b/helpers.lua
@@ -23,7 +23,8 @@ local string = {
 
 
 -- Helpers: provides helper functions for vicious widgets
-module("vicious.helpers")
+-- vicious.helpers
+local helpers = {}
 
 
 -- {{{ Variable definitions
@@ -32,14 +33,14 @@ local scroller = {}
 
 -- {{{ Helper functions
 -- {{{ Loader of vicious modules
-function wrequire(table,  key)
+function helpers.wrequire(table,  key)
     local module = rawget(table,  key)
     return module or require(table._NAME .. "." .. key)
 end
 -- }}}
 
 -- {{{ Expose path as a Lua table
-function pathtotable(dir)
+function helpers.pathtotable(dir)
     return setmetatable({ _path = dir },
         { __index = function(table, index)
             local path = table._path .. '/' .. index
@@ -61,7 +62,7 @@ end
 -- }}}
 
 -- {{{ Format a string with args
-function format(format, args)
+function helpers.format(format, args)
     for var, val in pairs(args) do
         format = format:gsub("$" .. (tonumber(var) and var or
             var:gsub("[-+?*]", function(i) return "%"..i end)),
@@ -73,7 +74,7 @@ end
 -- }}}
 
 -- {{{ Format units to one decimal point
-function uformat(array, key, value, unit)
+function helpers.uformat(array, key, value, unit)
     for u, v in pairs(unit) do
         array["{"..key.."_"..u.."}"] = string.format("%.1f", value/v)
     end
@@ -83,7 +84,7 @@ end
 -- }}}
 
 -- {{{ Escape a string
-function escape(text)
+function helpers.escape(text)
     local xml_entities = {
         ["\""] = "&quot;",
         ["&"]  = "&amp;",
@@ -97,7 +98,7 @@ end
 -- }}}
 
 -- {{{ Capitalize a string
-function capitalize(text)
+function helpers.capitalize(text)
     return text and text:gsub("([%w])([%w]*)", function(c, s)
         return string.upper(c) .. s
     end)
@@ -105,7 +106,7 @@ end
 -- }}}
 
 -- {{{ Truncate a string
-function truncate(text, maxlen)
+function helpers.truncate(text, maxlen)
     local txtlen = text:len()
 
     if txtlen > maxlen then
@@ -117,7 +118,7 @@ end
 -- }}}
 
 -- {{{ Scroll through a string
-function scroll(text, maxlen, widget)
+function helpers.scroll(text, maxlen, widget)
     if not scroller[widget] then
         scroller[widget] = { i = 1, d = true }
     end
@@ -146,4 +147,7 @@ function scroll(text, maxlen, widget)
     return text
 end
 -- }}}
+
+return helpers
+
 -- }}}
diff --git a/init.lua b/init.lua
index a476f85..fa57ea7 100644
--- a/init.lua
+++ b/init.lua
@@ -17,13 +17,11 @@ local table = {
     remove  = table.remove
 }
 
-require("vicious.helpers")
-require("vicious.widgets")
-require("vicious.contrib")
+local helpers = require("vicious.helpers")
 
 -- Vicious: widgets for the awesome window manager
-module("vicious")
-
+local vicious = {}
+vicious.widgets = require("vicious.widgets")
 
 -- Initialize tables
 local timers       = {}
@@ -141,7 +139,7 @@ end
 
 -- {{{ Global functions
 -- {{{ Register a widget
-function register(widget, wtype, format, timer, warg)
+function vicious.register(widget, wtype, format, timer, warg)
     local widget = widget
     local reg = {
         -- Set properties
@@ -171,12 +169,12 @@ end
 -- }}}
 
 -- {{{ Unregister a widget
-function unregister(widget, keep, reg)
+function vicious.unregister(widget, keep, reg)
     if reg == nil then
         for w, i in pairs(registered) do
             if w == widget then
                 for _, v in pairs(i) do
-                    reg = unregister(w, keep, v)
+                    reg = vicious.unregister(w, keep, v)
                 end
             end
         end
@@ -207,7 +205,7 @@ end
 -- }}}
 
 -- {{{ Enable caching of a widget type
-function cache(wtype)
+function vicious.cache(wtype)
     if wtype ~= nil then
         if widget_cache[wtype] == nil then
             widget_cache[wtype] = {}
@@ -217,7 +215,7 @@ end
 -- }}}
 
 -- {{{ Force update of widgets
-function force(wtable)
+function vicious.force(wtable)
     if type(wtable) == "table" then
         for _, w in pairs(wtable) do
             update(w, nil, true)
@@ -227,17 +225,17 @@ end
 -- }}}
 
 -- {{{ Suspend all widgets
-function suspend()
+function vicious.suspend()
     for w, i in pairs(registered) do
         for _, v in pairs(i) do
-            unregister(w, true, v)
+            vicious.unregister(w, true, v)
         end
     end
 end
 -- }}}
 
 -- {{{ Activate a widget
-function activate(widget)
+function vicious.activate(widget)
     for w, i in pairs(registered) do
         if widget == nil or w == widget then
             for _, v in pairs(i) do
@@ -247,4 +245,7 @@ function activate(widget)
     end
 end
 -- }}}
+
+return vicious
+
 -- }}}
diff --git a/widgets/bat.lua b/widgets/bat.lua
index 25a3aac..34d1124 100644
--- a/widgets/bat.lua
+++ b/widgets/bat.lua
@@ -16,7 +16,8 @@ local math = {
 
 
 -- Bat: provides state, charge, and remaining time for a requested battery
-module("vicious.widgets.bat")
+-- vicious.widgets.bat
+local bat = {}
 
 
 -- {{{ Battery widget type
@@ -86,4 +87,4 @@ local function worker(format, warg)
 end
 -- }}}
 
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })
+return setmetatable(bat, { __call = function(_, ...) return worker(...) end })
diff --git a/widgets/cpu.lua b/widgets/cpu.lua
index 86a3e85..fe6754a 100644
--- a/widgets/cpu.lua
+++ b/widgets/cpu.lua
@@ -7,7 +7,7 @@
 
 -- {{{ Grab environment
 local ipairs = ipairs
-local io = { lines = io.lines }
+local io = { open = io.open }
 local setmetatable = setmetatable
 local math = { floor = math.floor }
 local table = { insert = table.insert }
@@ -19,7 +19,8 @@ local string = {
 
 
 -- Cpu: provides CPU usage for all available CPUs/cores
-module("vicious.widgets.cpu")
+-- vicious.widgets.cpu
+local cpu = {}
 
 
 -- Initialize function tables
@@ -32,7 +33,8 @@ local function worker(format)
     local cpu_lines = {}
 
     -- Get CPU stats
-    for line in io.lines("/proc/stat") do
+    local f = io.open("/proc/stat")
+    for line in f:lines() do
         if string.sub(line, 1, 3) ~= "cpu" then break end
 
         cpu_lines[#cpu_lines+1] = {}
@@ -41,6 +43,7 @@ local function worker(format)
             table.insert(cpu_lines[#cpu_lines], i)
         end
     end
+    f:close()
 
     -- Ensure tables are initialized correctly
     for i = #cpu_total + 1, #cpu_lines do
@@ -74,4 +77,4 @@ local function worker(format)
 end
 -- }}}
 
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })
+return setmetatable(cpu, { __call = function(_, ...) return worker(...) end })
diff --git a/widgets/cpufreq.lua b/widgets/cpufreq.lua
index ba9749f..39470a4 100644
--- a/widgets/cpufreq.lua
+++ b/widgets/cpufreq.lua
@@ -12,14 +12,15 @@ local helpers = require("vicious.helpers")
 
 
 -- Cpufreq: provides freq, voltage and governor info for a requested CPU
-module("vicious.widgets.cpufreq")
+-- vicious.widgets.cpufreq
+local cpufreq = {}
 
 
 -- {{{ CPU frequency widget type
 local function worker(format, warg)
     if not warg then return end
 
-    local cpufreq = helpers.pathtotable("/sys/devices/system/cpu/"..warg.."/cpufreq")
+    local _cpufreq = helpers.pathtotable("/sys/devices/system/cpu/"..warg.."/cpufreq")
     local governor_state = {
        ["ondemand\n"]     = "↯",
        ["powersave\n"]    = "⌁",
@@ -34,22 +35,22 @@ local function worker(format, warg)
     }
 
     -- Get the current frequency
-    local freq = tonumber(cpufreq.scaling_cur_freq)
+    local freq = tonumber(_cpufreq.scaling_cur_freq)
     -- Calculate MHz and GHz
     if freq then
         freqv.mhz = freq / 1000
         freqv.ghz = freqv.mhz / 1000
 
         -- Get the current voltage
-        if cpufreq.scaling_voltages then
-            freqv.mv = tonumber(string.match(cpufreq.scaling_voltages, freq.."[%s]([%d]+)"))
+        if _cpufreq.scaling_voltages then
+            freqv.mv = tonumber(string.match(_cpufreq.scaling_voltages, freq.."[%s]([%d]+)"))
             -- Calculate voltage from mV
             freqv.v  = freqv.mv / 1000
         end
     end
 
     -- Get the current governor
-    local governor = cpufreq.scaling_governor
+    local governor = _cpufreq.scaling_governor
     -- Represent the governor as a symbol
     governor = governor_state[governor] or governor or "N/A"
 
@@ -57,4 +58,4 @@ local function worker(format, warg)
 end
 -- }}}
 
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })
+return setmetatable(cpufreq, { __call = function(_, ...) return worker(...) end })
diff --git a/widgets/cpuinf.lua b/widgets/cpuinf.lua
index b925b27..b0ea782 100644
--- a/widgets/cpuinf.lua
+++ b/widgets/cpuinf.lua
@@ -12,7 +12,8 @@ local string = { gmatch = string.gmatch }
 
 
 -- Cpuinf: provides speed and cache information for all available CPUs/cores
-module("vicious.widgets.cpuinf")
+-- vicious.widgets.cpuinf
+local cpuinf = {}
 
 
 -- {{{ CPU Information widget type
@@ -40,4 +41,4 @@ local function worker(format)
 end
 -- }}}
 
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })
+return setmetatable(cpuinf, { __call = function(_, ...) return worker(...) end })
diff --git a/widgets/date.lua b/widgets/date.lua
index d3c6ce9..17f4f3f 100644
--- a/widgets/date.lua
+++ b/widgets/date.lua
@@ -14,7 +14,8 @@ local os = {
 
 
 -- Date: provides access to os.date with optional time formatting
-module("vicious.widgets.date")
+-- vicious.widgets.date
+local date = {}
 
 
 -- {{{ Date widget type
@@ -23,4 +24,4 @@ local function worker(format, warg)
 end
 -- }}}
 
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })
+return setmetatable(date, { __call = function(_, ...) return worker(...) end })
diff --git a/widgets/dio.lua b/widgets/dio.lua
index 28f0a79..6d13c54 100644
--- a/widgets/dio.lua
+++ b/widgets/dio.lua
@@ -16,8 +16,9 @@ local os = {
 -- }}}
 
 
--- Disk I/O: provides I/O statistics for storage devices/partitions (only linux >= 2.6 )
-module("vicious.widgets.dio")
+-- Disk I/O: provides I/O statistics for requested storage devices
+-- vicious.widgets.dio
+local dio = {}
 
 
 -- Initialize function tables
@@ -69,4 +70,4 @@ local function worker(format)
 end
 -- }}}
 
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })
+return setmetatable(dio, { __call = function(_, ...) return worker(...) end })
diff --git a/widgets/fs.lua b/widgets/fs.lua
index 63d2089..c0b7f16 100644
--- a/widgets/fs.lua
+++ b/widgets/fs.lua
@@ -14,7 +14,8 @@ local helpers = require("vicious.helpers")
 
 
 -- FS: provides file system disk space usage
-module("vicious.widgets.fs")
+-- vicious.widgets.fs
+local fs = {}
 
 
 -- Variable definitions
@@ -48,4 +49,4 @@ local function worker(format, warg)
 end
 -- }}}
 
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })
+return setmetatable(fs, { __call = function(_, ...) return worker(...) end })
diff --git a/widgets/gmail.lua b/widgets/gmail.lua
index fe0be45..ba8e731 100644
--- a/widgets/gmail.lua
+++ b/widgets/gmail.lua
@@ -17,7 +17,8 @@ local string = {
 
 
 -- Gmail: provides count of new and subject of last e-mail on Gmail
-module("vicious.widgets.gmail")
+-- vicious.widgets.gmail
+local gmail = {}
 
 
 -- {{{ Variable definitions
@@ -79,4 +80,4 @@ local function worker(format, warg)
 end
 -- }}}
 
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })
+return setmetatable(gmail, { __call = function(_, ...) return worker(...) end })
diff --git a/widgets/hddtemp.lua b/widgets/hddtemp.lua
index 0c79656..85ee767 100644
--- a/widgets/hddtemp.lua
+++ b/widgets/hddtemp.lua
@@ -12,7 +12,8 @@ local string = { gmatch = string.gmatch }
 
 
 -- Hddtemp: provides hard drive temperatures using the hddtemp daemon
-module("vicious.widgets.hddtemp")
+-- vicious.widgets.hddtemp
+local hddtemp = {}
 
 
 -- {{{ HDD Temperature widget type
@@ -34,4 +35,4 @@ local function worker(format, warg)
 end
 -- }}}
 
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })
+return setmetatable(hddtemp, { __call = function(_, ...) return worker(...) end })
diff --git a/widgets/init.lua b/widgets/init.lua
index 6ec6360..4625df0 100644
--- a/widgets/init.lua
+++ b/widgets/init.lua
@@ -10,8 +10,9 @@ local setmetatable = setmetatable
 local wrequire = require("vicious.helpers").wrequire
 
 -- Vicious: widgets for the awesome window manager
-module("vicious.widgets")
+-- vicious.widgets
+local widgets = { _NAME = "vicious.widgets" }
 -- }}}
 
 -- Load modules at runtime as needed
-setmetatable(_M, { __index = wrequire })
+return setmetatable(widgets, { __index = wrequire })
diff --git a/widgets/mbox.lua b/widgets/mbox.lua
index be64e03..7b92e36 100644
--- a/widgets/mbox.lua
+++ b/widgets/mbox.lua
@@ -13,7 +13,8 @@ local helpers = require("vicious.helpers")
 
 
 -- Mbox: provides the subject of last e-mail in a mbox file
-module("vicious.widgets.mbox")
+-- vicious.widgets.mbox
+local mbox = {}
 
 
 -- Initialize variables
@@ -24,9 +25,9 @@ local function worker(format, warg)
     if not warg then return end
 
     -- mbox could be huge, get a 30kb chunk from EOF
-    if type(warg) ~= "table" then mbox = warg end
+    if type(warg) ~= "table" then _mbox = warg end
     -- * attachment could be much bigger than 30kb
-    local f = io.open(mbox or warg[1])
+    local f = io.open(_mbox or warg[1])
     f:seek("end", -30720)
     local txt = f:read("*all")
     f:close()
@@ -49,4 +50,4 @@ local function worker(format, warg)
 end
 -- }}}
 
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })
+return setmetatable(mbox, { __call = function(_, ...) return worker(...) end })
diff --git a/widgets/mboxc.lua b/widgets/mboxc.lua
index c928cd3..3226917 100644
--- a/widgets/mboxc.lua
+++ b/widgets/mboxc.lua
@@ -11,7 +11,8 @@ local string = { find = string.find }
 
 
 -- Mboxc: provides the count of total, old and new messages in mbox files
-module("vicious.widgets.mboxc")
+-- vicious.widgets.mboxc
+local mboxc = {}
 
 
 -- {{{ Mbox count widget type
@@ -54,4 +55,4 @@ local function worker(format, warg)
 end
 -- }}}
 
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })
+return setmetatable(mbox, { __call = function(_, ...) return worker(...) end })
diff --git a/widgets/mdir.lua b/widgets/mdir.lua
index 464d9a1..32dd3b3 100644
--- a/widgets/mdir.lua
+++ b/widgets/mdir.lua
@@ -11,7 +11,8 @@ local setmetatable = setmetatable
 
 
 -- Mdir: provides the number of new and unread messages in Maildir structures/dirs
-module("vicious.widgets.mdir")
+-- vicious.widgets.mdir
+local mdir = {}
 
 
 -- {{{ Maildir widget type
@@ -37,4 +38,4 @@ local function worker(format, warg)
 end
 -- }}}
 
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })
+return setmetatable(mdir, { __call = function(_, ...) return worker(...) end })
diff --git a/widgets/mem.lua b/widgets/mem.lua
index dfa06e1..67ef42a 100644
--- a/widgets/mem.lua
+++ b/widgets/mem.lua
@@ -13,39 +13,40 @@ local string = { gmatch = string.gmatch }
 
 
 -- Mem: provides RAM and Swap usage statistics
-module("vicious.widgets.mem")
+-- vicious.widgets.mem
+local mem = {}
 
 
 -- {{{ Memory widget type
 local function worker(format)
-    local mem = { buf = {}, swp = {} }
+    local _mem = { buf = {}, swp = {} }
 
     -- Get MEM info
     for line in io.lines("/proc/meminfo") do
         for k, v in string.gmatch(line, "([%a]+):[%s]+([%d]+).+") do
-            if     k == "MemTotal"  then mem.total = math.floor(v/1024)
-            elseif k == "MemFree"   then mem.buf.f = math.floor(v/1024)
-            elseif k == "Buffers"   then mem.buf.b = math.floor(v/1024)
-            elseif k == "Cached"    then mem.buf.c = math.floor(v/1024)
-            elseif k == "SwapTotal" then mem.swp.t = math.floor(v/1024)
-            elseif k == "SwapFree"  then mem.swp.f = math.floor(v/1024)
+            if     k == "MemTotal"  then _mem.total = math.floor(v/1024)
+            elseif k == "MemFree"   then _mem.buf.f = math.floor(v/1024)
+            elseif k == "Buffers"   then _mem.buf.b = math.floor(v/1024)
+            elseif k == "Cached"    then _mem.buf.c = math.floor(v/1024)
+            elseif k == "SwapTotal" then _mem.swp.t = math.floor(v/1024)
+            elseif k == "SwapFree"  then _mem.swp.f = math.floor(v/1024)
             end
         end
     end
 
     -- Calculate memory percentage
-    mem.free  = mem.buf.f + mem.buf.b + mem.buf.c
-    mem.inuse = mem.total - mem.free
-    mem.bcuse = mem.total - mem.buf.f
-    mem.usep  = math.floor(mem.inuse / mem.total * 100)
+    _mem.free  = _mem.buf.f + _mem.buf.b + _mem.buf.c
+    _mem.inuse = _mem.total - _mem.free
+    _mem.bcuse = _mem.total - _mem.buf.f
+    _mem.usep  = math.floor(_mem.inuse / _mem.total * 100)
     -- Calculate swap percentage
-    mem.swp.inuse = mem.swp.t - mem.swp.f
-    mem.swp.usep  = math.floor(mem.swp.inuse / mem.swp.t * 100)
+    _mem.swp.inuse = _mem.swp.t - _mem.swp.f
+    _mem.swp.usep  = math.floor(_mem.swp.inuse / _mem.swp.t * 100)
 
-    return {mem.usep,     mem.inuse,     mem.total, mem.free,
-            mem.swp.usep, mem.swp.inuse, mem.swp.t, mem.swp.f, 
-            mem.bcuse }
+    return {_mem.usep,     _mem.inuse,     _mem.total, _mem.free,
+            _mem.swp.usep, _mem.swp.inuse, _mem.swp.t, _mem.swp.f,
+            _mem.bcuse }
 end
 -- }}}
 
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })
+return setmetatable(mem, { __call = function(_, ...) return worker(...) end })
diff --git a/widgets/mpd.lua b/widgets/mpd.lua
index 143eec9..e4bcb0b 100644
--- a/widgets/mpd.lua
+++ b/widgets/mpd.lua
@@ -13,7 +13,8 @@ local helpers = require("vicious.helpers")
 
 
 -- Mpd: provides Music Player Daemon information
-module("vicious.widgets.mpd")
+-- vicious.widgets.mpd
+local mpd = {}
 
 
 -- {{{ MPD widget type
@@ -60,4 +61,4 @@ local function worker(format, warg)
 end
 -- }}}
 
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })
+return setmetatable(mpd, { __call = function(_, ...) return worker(...) end })
diff --git a/widgets/net.lua b/widgets/net.lua
index b8a270c..d81d012 100644
--- a/widgets/net.lua
+++ b/widgets/net.lua
@@ -15,7 +15,8 @@ local helpers = require("vicious.helpers")
 
 
 -- Net: provides state and usage statistics of all network interfaces
-module("vicious.widgets.net")
+-- vicious.widgets.net
+local net = {}
 
 
 -- Initialize function tables
@@ -76,4 +77,4 @@ local function worker(format)
 end
 -- }}}
 
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })
+return setmetatable(net, { __call = function(_, ...) return worker(...) end })
diff --git a/widgets/org.lua b/widgets/org.lua
index 2d563b2..5254ab7 100644
--- a/widgets/org.lua
+++ b/widgets/org.lua
@@ -16,7 +16,8 @@ local os = {
 
 
 -- Org: provides agenda statistics for Emacs org-mode
-module("vicious.widgets.org")
+-- vicious.widgets.org
+local org = {}
 
 
 -- {{{ OrgMode widget type
@@ -58,4 +59,4 @@ local function worker(format, warg)
 end
 -- }}}
 
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })
+return setmetatable(org, { __call = function(_, ...) return worker(...) end })
diff --git a/widgets/os.lua b/widgets/os.lua
index 57b807a..288fcd4 100644
--- a/widgets/os.lua
+++ b/widgets/os.lua
@@ -19,7 +19,8 @@ local string = {
 
 
 -- OS: provides operating system information
-module("vicious.widgets.os")
+-- vicious.widgets.os
+local os = {}
 
 
 -- {{{ Operating system widget type
@@ -69,4 +70,4 @@ local function worker(format)
 end
 -- }}}
 
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })
+return setmetatable(os, { __call = function(_, ...) return worker(...) end })
diff --git a/widgets/pkg.lua b/widgets/pkg.lua
index 62d0ccb..9ec03c0 100644
--- a/widgets/pkg.lua
+++ b/widgets/pkg.lua
@@ -11,7 +11,8 @@ local setmetatable = setmetatable
 
 
 -- Pkg: provides number of pending updates on UNIX systems
-module("vicious.widgets.pkg")
+-- vicious.widgets.pkg
+local pkg = {}
 
 
 -- {{{ Packages widget type
@@ -31,16 +32,16 @@ local function worker(format, warg)
     }
 
     -- Check if updates are available
-    local pkg = manager[warg]
-    local f = io.popen(pkg.cmd)
+    local _pkg = manager[warg]
+    local f = io.popen(_pkg.cmd)
 
     for line in f:lines() do
         updates = updates + 1
     end
     f:close()
 
-    return {pkg.sub and math.max(updates-pkg.sub, 0) or updates}
+    return {_pkg.sub and math.max(updates-_pkg.sub, 0) or updates}
 end
 -- }}}
 
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })
+return setmetatable(pkg, { __call = function(_, ...) return worker(...) end })
diff --git a/widgets/raid.lua b/widgets/raid.lua
index c1b7e02..eafb118 100644
--- a/widgets/raid.lua
+++ b/widgets/raid.lua
@@ -4,7 +4,7 @@
 -----------------------------------------------------
 
 -- {{{ Grab environment
-local io = { lines = io.lines }
+local io = { open = io.open }
 local setmetatable = setmetatable
 local string = {
     len = string.len,
@@ -16,7 +16,8 @@ local string = {
 
 
 -- Raid: provides state information for a requested RAID array
-module("vicious.widgets.raid")
+-- vicious.widgets.raid
+local raid = {}
 
 
 -- Initialize function tables
@@ -32,7 +33,8 @@ local function worker(format, warg)
     }
 
     -- Linux manual page: md(4)
-    for line in io.lines("/proc/mdstat") do
+    local f = io.open("/proc/mdstat")
+    for line in f:lines() do
         if mddev[warg]["found"] then
             local updev = string.match(line, "%[[_U]+%]")
 
@@ -49,9 +51,10 @@ local function worker(format, warg)
             end
         end
     end
+    f:close()
 
     return {mddev[warg]["assigned"], mddev[warg]["active"]}
 end
 -- }}}
 
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })
+return setmetatable(raid, { __call = function(_, ...) return worker(...) end })
diff --git a/widgets/thermal.lua b/widgets/thermal.lua
index c81431f..7592b72 100644
--- a/widgets/thermal.lua
+++ b/widgets/thermal.lua
@@ -13,7 +13,8 @@ local helpers = require("vicious.helpers")
 
 
 -- Thermal: provides temperature levels of ACPI and coretemp thermal zones
-module("vicious.widgets.thermal")
+-- vicious.widgets.thermal
+local thermal = {}
 
 
 -- {{{ Thermal widget type
@@ -28,9 +29,9 @@ local function worker(format, warg)
     warg = type(warg) == "table" and warg or { warg, "sys" }
 
     -- Get temperature from thermal zone
-    local thermal = helpers.pathtotable(zone[warg[2]][1] .. warg[1])
+    local _thermal = helpers.pathtotable(zone[warg[2]][1] .. warg[1])
 
-    local data = warg[3] and thermal[warg[3]] or thermal[zone[warg[2]].file]
+    local data = warg[3] and _thermal[warg[3]] or _thermal[zone[warg[2]].file]
     if data then
         if zone[warg[2]].div then
             return {data / zone[warg[2]].div}
@@ -43,4 +44,4 @@ local function worker(format, warg)
 end
 -- }}}
 
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })
+return setmetatable(thermal, { __call = function(_, ...) return worker(...) end })
diff --git a/widgets/uptime.lua b/widgets/uptime.lua
index ece3739..14de99a 100644
--- a/widgets/uptime.lua
+++ b/widgets/uptime.lua
@@ -13,7 +13,8 @@ local helpers = require("vicious.helpers")
 
 
 -- Uptime: provides system uptime and load information
-module("vicious.widgets.uptime")
+-- vicious.widgets.uptime
+local uptime = {}
 
 
 -- {{{ Uptime widget type
@@ -32,4 +33,4 @@ local function worker(format)
 end
 -- }}}
 
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })
+local setmetatable(uptime, { __call = function(_, ...) return worker(...) end })
diff --git a/widgets/volume.lua b/widgets/volume.lua
index 8f34609..3baa7e6 100644
--- a/widgets/volume.lua
+++ b/widgets/volume.lua
@@ -12,7 +12,8 @@ local string = { match = string.match }
 
 
 -- Volume: provides volume levels and state of requested ALSA mixers
-module("vicious.widgets.volume")
+-- vicious.widgets.volume
+local volume = {}
 
 
 -- {{{ Volume widget type
@@ -49,4 +50,4 @@ local function worker(format, warg)
 end
 -- }}}
 
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })
+return setmetatable(volume, { __call = function(_, ...) return worker(...) end })
diff --git a/widgets/weather.lua b/widgets/weather.lua
index f54fbc3..356f32f 100644
--- a/widgets/weather.lua
+++ b/widgets/weather.lua
@@ -14,11 +14,12 @@ local helpers = require("vicious.helpers")
 
 
 -- Weather: provides weather information for a requested station
-module("vicious.widgets.weather")
+-- vicious.widgets.weather
+local weather = {}
 
 
 -- Initialize function tables
-local weather = {
+local _weather = {
     ["{city}"]    = "N/A",
     ["{wind}"]    = "N/A",
     ["{windmph}"] = "N/A",
@@ -43,43 +44,43 @@ local function worker(format, warg)
     f:close()
 
     -- Check if there was a timeout or a problem with the station
-    if ws == nil then return weather end
+    if ws == nil then return _weather end
 
-    weather["{city}"]    = -- City and/or area
-       string.match(ws, "^(.+)%,.*%([%u]+%)") or weather["{city}"]
-    weather["{wind}"]    = -- Wind direction and degrees if available
-       string.match(ws, "Wind:[%s][%a]+[%s][%a]+[%s](.+)[%s]at.+$") or weather["{wind}"]
-    weather["{windmph}"] = -- Wind speed in MPH if available
-       string.match(ws, "Wind:[%s].+[%s]at[%s]([%d]+)[%s]MPH") or weather["{windmph}"]
-    weather["{sky}"]     = -- Sky conditions if available
-       string.match(ws, "Sky[%s]conditions:[%s](.-)[%c]") or weather["{sky}"]
-    weather["{weather}"] = -- Weather conditions if available
-       string.match(ws, "Weather:[%s](.-)[%c]") or weather["{weather}"]
-    weather["{tempf}"]   = -- Temperature in fahrenheit
-       string.match(ws, "Temperature:[%s]([%-]?[%d%.]+).*[%c]") or weather["{tempf}"]
-    weather["{humid}"]   = -- Relative humidity in percent
-       string.match(ws, "Relative[%s]Humidity:[%s]([%d]+)%%") or weather["{humid}"]
-    weather["{press}"]   = -- Pressure in hPa
-       string.match(ws, "Pressure[%s].+%((.+)[%s]hPa%)") or weather["{press}"]
+    _weather["{city}"]    = -- City and/or area
+       string.match(ws, "^(.+)%,.*%([%u]+%)") or _weather["{city}"]
+    _weather["{wind}"]    = -- Wind direction and degrees if available
+       string.match(ws, "Wind:[%s][%a]+[%s][%a]+[%s](.+)[%s]at.+$") or _weather["{wind}"]
+    _weather["{windmph}"] = -- Wind speed in MPH if available
+       string.match(ws, "Wind:[%s].+[%s]at[%s]([%d]+)[%s]MPH") or _weather["{windmph}"]
+    _weather["{sky}"]     = -- Sky conditions if available
+       string.match(ws, "Sky[%s]conditions:[%s](.-)[%c]") or _weather["{sky}"]
+    _weather["{weather}"] = -- Weather conditions if available
+       string.match(ws, "Weather:[%s](.-)[%c]") or _weather["{weather}"]
+    _weather["{tempf}"]   = -- Temperature in fahrenheit
+       string.match(ws, "Temperature:[%s]([%-]?[%d%.]+).*[%c]") or _weather["{tempf}"]
+    _weather["{humid}"]   = -- Relative humidity in percent
+       string.match(ws, "Relative[%s]Humidity:[%s]([%d]+)%%") or _weather["{humid}"]
+    _weather["{press}"]   = -- Pressure in hPa
+       string.match(ws, "Pressure[%s].+%((.+)[%s]hPa%)") or _weather["{press}"]
 
     -- Wind speed in km/h if MPH was available
-    if weather["{windmph}"] ~= "N/A" then
-       weather["{windmph}"] = tonumber(weather["{windmph}"])
-       weather["{windkmh}"] = math.ceil(weather["{windmph}"] * 1.6)
+    if _weather["{windmph}"] ~= "N/A" then
+       _weather["{windmph}"] = tonumber(_weather["{windmph}"])
+       _weather["{windkmh}"] = math.ceil(_weather["{windmph}"] * 1.6)
     end -- Temperature in °C if °F was available
-    if weather["{tempf}"] ~= "N/A" then
-       weather["{tempf}"] = tonumber(weather["{tempf}"])
-       weather["{tempc}"] = math.ceil((weather["{tempf}"] - 32) * 5/9)
+    if _weather["{tempf}"] ~= "N/A" then
+       _weather["{tempf}"] = tonumber(_weather["{tempf}"])
+       _weather["{tempc}"] = math.ceil((_weather["{tempf}"] - 32) * 5/9)
     end -- Capitalize some stats so they don't look so out of place
-    if weather["{sky}"] ~= "N/A" then
-       weather["{sky}"] = helpers.capitalize(weather["{sky}"])
+    if _weather["{sky}"] ~= "N/A" then
+       _weather["{sky}"] = helpers.capitalize(_weather["{sky}"])
     end
-    if weather["{weather}"] ~= "N/A" then
-       weather["{weather}"] = helpers.capitalize(weather["{weather}"])
+    if _weather["{weather}"] ~= "N/A" then
+       _weather["{weather}"] = helpers.capitalize(_weather["{weather}"])
     end
 
-    return weather
+    return _weather
 end
 -- }}}
 
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })
+return setmetatable(weather, { __call = function(_, ...) return worker(...) end })
diff --git a/widgets/wifi.lua b/widgets/wifi.lua
index 3e30dc9..80dcdee 100644
--- a/widgets/wifi.lua
+++ b/widgets/wifi.lua
@@ -20,7 +20,8 @@ local string = {
 
 
 -- Wifi: provides wireless information for a requested interface
-module("vicious.widgets.wifi")
+-- vicious.widgets.wifi
+local wifi = {}
 
 
 -- {{{ Wireless widget type
@@ -77,4 +78,4 @@ local function worker(format, warg)
 end
 -- }}}
 
-setmetatable(_M, { __call = function(_, ...) return worker(...) end })
+return setmetatable(wifi, { __call = function(_, ...) return worker(...) end })