Mac only: We've featured numerous apps that bring Windows Aero Snap-like abilities to OS X, but Divvy takes it a step further, by splitting your screen up into smaller portions and allowing you to more fully customise your screen organisation.
What makes Divvy great is instead of just splitting up your screen into two halves, you have a lot more control in how you want to split up your screen real estate. You can make one window full-screen, put two side-by-side or even split up three, four or even nine windows in varying sizes. You do this by opening up the divvy window, which consists of a nice grid that represents your screen. You then drag your mouse over this grid to tell Divvy where you want the frontmost window to be on the screen, and it will automatically snap to that position. You can then move on to the next app and do the same.
Of course, not everyone loves constantly clicking their mouse. Divvy allows you to not only create a hotkey to bring up the Divvy window, but you can also make keyboard shortcuts for any window size and position, so you can access frequently used set-ups with just a few keyboard shortcuts. Check out the video to see it in action, and stop being jealous of Aero Snap forever.
Divvy is free as nagware, costs $US14 for the nag-free version and is for Mac OS X only.