TotalSpaces is a desktop manager that brings back grid Spaces to OS X 10.7 Lion and more!
Define your grid – and navigate left, right, up and down between your desktops
Choose your transitions – Cube, slide and other effects, or turn them off altogether to really speed up your mac
Manage your desktops and windows from the Overview Grid – a birds-eye view of your grid
Hotkeys, hot-corners, circulation options and more
Intel, OS X 10.9 or later