Virtual Dimension (Score 1)

By far the best one I've used is calll Virtual Dimension. I can set it up to behave just like GNOME, with CTRL + ALT + RIGHT to move to the desk at the right, and CTRL + ALT + LEFT to move left. One can also drag and drop icons from desk to desk, or make a window appear on all desks. It's also integrated into Window's shell.
Check it out:
http://virt-dimension.sourceforge.net/