Conky is a system monitor that can display just about anything, either on your root desktop or in its own window. Conky has many built-in objects, as well as the ability to execute external programs or scripts (either external or through built-in Lua support).

This is a basic package that can be useful in servers or piped with dzen2. It includes the following support:

MPD, MOC, math, apcupsd, ncurses and I/O stats.