Tile 2 windows side by side by keyboard shortcuts

I am using Mac OS X Lion 10.7.2, often I like to display 2 windows side by side, does anyone know if there is any application which makes it possible to tile windows by simple keyboard shortcuts?


I use Better Touch Tool to do that.

Here's an example configuration that has a keyboard shortcut for resizing to the right half and one for the left half. I also have a shortcut that quickly maximizes a window. Example BTT configuration