VirtuaWin is our last selection. VirtuaWin brings the featureset back down to a minimum - no graphical representation of the desktops and windows - instead having a simple window that allows you to click on the window you would like to switch to, move to this desktop, or always show no matter which desktop you're on. The number next to the application or window symbolizes the desktop is is currently housed on. VirtuaWin 's simplicity is by design; instead of adding a bunch of features most users would not use, VirtuaWin instead relies upon addon modules to extend its functionality. There are a list of available modules on the VirtuaWin website.
Screenshot of VirtuaWin interface by Wally Bahny for TechRepublic