List of plugins to implement:

     iostat [-x] [-d] [-c] [-N] -yzk [-p | <devices>...] <interval>
     SMART monitoring
     Solar position
     Network usage
     CPU usage
     Current CPU speed
     Xmonad
     Battery
     Music players
     Volume control
     /proc/acpi (mute)
     System tray
     Eyes
     Launchers
     Taskbar (as in rarity)
     Application menu
     UPS
     Line reader
     Blueshift integration
     Backlight control
     /proc/stat
     /sys/devices/system/cpu/cpuX
     hdparm
     Thermal monitoring
     ESSID and link quality for wireless interfaces
     News feed syndication
     Keyboard lock keys
     Keyboard layout
     EWMH