allSnap

The other day I was listening to the Security Now podcast and Steve Gibson mentioned a program "allSnap" that allows you to "snap" your windows to the side of your screen. If you remember Winamp it would do this, when you moved it close enough to the edge of the screen it was "snap" to it and "stick" there unless you pulled it away. Anyway, allSnap does that with any applications and it's free, try it here.