Windows only: If you like the look of Windows 7's great new keyboard shortcuts but aren't planning to upgrade for a while, Windows 7 Shortcuts enables some of the best Win7 shortcuts for XP and Vista.
Windows 7 Shortcuts was submitted by Lifehacker reader Rupert and was written in one of our favourite scripting languages, AutoHotkey. Right now, Windows 7 Shortcuts supports the following keyboard shortcuts:
Win+Left/Right arrows: Dock the window to each side of the monitor
Win+Up arrow: Maximize the active window
Win+Down arrow: Minimize the window/Restore the window if it's maximized
Win+Space: Note from the developer: AHK won't allow multiple windows to be made transparent easily. Therefore, I've changed it to make the active window transparent until it is released.
If you're an AHK user, you can grab the source and paste it into the script you use daily. If not, download the EXE by clicking the Download link above.
Windows 7 Shortcuts is a free download, Windows only.