TotalSpaces provides a grid of spaces on OSX Lion
An easy to use 2D grid of desktops, inspired by the implementation OS X Snow Leopard. Navigate using the cursor keys, choose your transitions, and quickly access a birds eye view of your grid of spaces where you can manage your application windows.
Define your grid
Navigate left, right, up and down between your desktops.
Manage your desktops
Display an overview of desktops and drag windows between them. More Info »
Choose your transitions
Fully customizable transitions and hotkeys.
Swipe between desktops
Moving around your grid has never been easier
Trigger the overview grid just by moving your mouse.
Keep your apps where you want them. Assign apps to desktops.
Free license to everyone who meets specific criteria http://totalspaces.binaryage.com/free-licenses