[Mac Only] Warp is a free application developed by Kent Suntherland. It allows you to switch between spaces in your Mac OS X Leopard without using keyboard. All you need to do is just hover your mouse at the edge of the screen and it will switch automatically to the next spaces. This free app comes with a donation request. A demo of Warp in action is available on the website.

Warp tip: To move an application to another Space, hold the header part and drag it to the screen edge.

Download Warp.