[x0054]

I would recommend Better Touch Tool over SizeUp. It allows you to setup keyboard shortcuts as well as touchpad gestures to resize windows, and do a lot of other actions.

[Raphmedia]

Yes! I love that software. I used it to make the gestures the same between my touchpad and my magic mouse. It's stupid how it's 3 fingers on one and 2 on the other.

[ericHosick]

I was also surprised not seeing Better Touch Tool there. It is a great program.

For example, I've mapped switching between tabs to TipTap left and TipTap right for any software that has tabs (Chrome, FireFox, Terminal, TextMate, etc.).

[cseelus]

For window management i love Moom, as it integrates really well with OSX.

To add more gestures for my touchpad (like TipTap-Left to switch tabs in every application that has them) I use Better Touch Tool.

[acangiano]

I like the simplicity of Windows Magnet.