The window management for OSX sort of... sucks. I've been using Windows for years and just bought a Mac and I was pretty shocked at how much effort it took to tile two windows.
And no, I do not need you to list anything. This is not a macho pissing match and I am not insulting your manhood. Use what works best for you.
However, it's kind of ordinary that you have to pay $15 to get functionality that should be included in the WM.