Rainmeter is a customizable performance meter, which can display the CPU load, memory utilization, disk space, network traffic, time and many more things.

Here are some key features of "Rainmeter":

· Freeform skins
· Supports Windows transparency
· Plugin system for 3rd party support
· Anti-aliased drawing routines
· Works also as Litestep plugin
· Has ability to hide on mouse over
· Can stick to the desktop (i.e. doesn't hide with Show Desktop)
· Skins can react to mouse events
· Multiple skins can be ran at the same time
· Can be controlled from 3rd party applications with !bangs