Looks a little like ShiftIt (a similar utility) http://code.google.com/p/shiftit/

You want to use the github fork which is still being developed.

Thanks for the notice. I get the auto updates and hadn't noticed I was on 1.5 and the google code page stops at 1.2

Spectacle is an awesome open source util for this too: http://spectacle.divisiblebyzero.com

Yeah, over the years Mac OS has increasingly offered functionality that was once a separate utility to install, MacDivvy is one of the few utilities left I install separately.

One of Divvy's coolest features is you can build preset window positions and attach them to keyboard chords. So for me, cmd-shift-space brings up divvy then hitting 1 makes the app fill the window, 2 is upper left 2/3 of the screen, 3 is upper right 2/3 of the screen, etc -- I have 7 or 8 presets. Full keyboard control of window position is awesome. It's the best $13 I've ever spent.

retailmenot also claims a $20% code, so that will knock some money off. But I happily paid retail and I use it 100 times a day. It's also particularly helpful if you use an external monitor at your desk and regularly resize windows as you attach or detach the monitor.