Managing windows size and position in OSX
ShiftIt is an application for OSX that allows you to quickly manipulate window's position and size using a predefined ket keys.
License: GNU General Public License v3
The idea is to add just a few features that are currently missing like keyboard configuration, menu icon, etc., make it a solid production ready app.
Actually menu icon is done - thanks to free icons available at mysitemyway
There is a feature full comertial application called SizeUp that I guess was an inspiration for the original ShitIt. If you are looking for a ready application with lot of features, SizeUp is way to go.