SizeUp (also by irradiatedsoftware) is like cinch but with hotkeys instead of mouse management. It handles full, split, vsplit, quarters, multi-monitor, and multi-"space". I've been using it for a while now.

Divvy has an edge with the customizable zones; the 66/33 split from the video is a good example. SizeUp has the edge by being 100% usable mouse-free OOTB.