WinSwitch
This is a simple utility that helps you switching from a program to another. It pops up when you press the ALT and TAB keys together, and replaces the small window that currently appears when those keys are pressed on Windows systems. As you can see below, WinSwitch is more versatile because it shows a screenshot for every program running on your pc.
You can download WinSwitch for free in a few seconds; just click here (24 Kb - Win NT, 2000 and XP).