While users of Windows 7 can enjoy Aero Snap, it is not the case for Windows XP and Vista users, however a neat free application called AeroSnap allows this functionality in Windows XP and Vista. I lover Aero Snap in Windows 7 as its great and easy in helping to compare documents and folders, without having to manually resize.
AeroSnap is a simple but powerful application that allows you to resize, arrange or maximize your desktop windows with just drag’n’drop.
Simple drag a window to a side of your desktop to snap it or drag it to the top to maximize.
When you drag it back to the last position, the last window size will be restored. Really easy, isn’t it?
It also works with multiple monitors!
Do bare in mind that this application is still beta, but it worked fine in the test I did earlier on Windows Vista.