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
     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