I've been using WinSplit Revolution for years and love it. It's not extensible, but lets you do things like toggle between 1/3, 1/2, and 2/3 of the space, whi

I've been using WinSplit Revolution for years and love it. It's not extensible, but lets you do things like toggle between 1/3, 1/2, and 2/3 of the space, which I use a lot.