"VirtueDesktops" is a Virtual Desktop manager for Apple's Mac OS. It offers features, eye candy and configurable options that no other Desktop Manager on the mac has added yet. Sadly, VirtueDesktops is no longer under active development. It is based upon the work done by Rich Wareham on DesktopManager (specifically the CGSPrivate headers), which is an alternate open-source virtual desktop application. Below are some of the key features of VirtueDesktops.
Virtual screens: an unlimited number of virtual screens at your disposal Eye candy: exciting transitions and window fading Universal binary: runs at Full Speed on your shiny new intel-based mac AppleScript-able: script your desktop experience Unobtrusive: VirtueDesktops does not clutter your desktop - it gets in, switches your virtual screen and then quietly hides itself, waiting for your next request Extensible: install plugins to add additional features Keeps you informed: notifications and current desktop display orient you as you work across multiple virtual screens "Stick-ify" your windows or applications: Make your windows and applications visible across all of your virtual screens.