Rainmeter
Open Source
Rainmeter displays customizable skins, like memory and battery power, RSS feeds and weather forecasts, right on desktop.
GKrellM
Open Source
GKrellM (GNU Krell Monitors) is a system monitor software based on the GTK+ toolkit that creates a single process stack of system monitors.
XWidget
Free
XWidget is a Free desktop customization platform. It’s light, handy with powerful visual widget editor and very smooth animations.
Desktop Info
Free
Desktop Info displays system information on your desktop in a similar way to some other desktop information tools.
Compare GeekTool with alternatives
Compare Desktop Info and GeekTool and decide which is most suitable for you.