Dexpot is a great free (for private use) virtual desktop manager. What makes Dexpot unique is the fact that you can have rules that designate certain applications that live on certain virtual windows. It also can show you the open applications in a catalogue format, and lets you preview each virtual window without switching. It’s probably one of the few full featured virtual desktop managers that is still free for use. So get yours today for all Windows except x64.
Lifehacker < Dexpot