Been using this app for a long time, but a new build was released a few days ago, and it added a whole lot of new stuff. If you've used and liked the Microsoft Alt+Tab replacement Powertoy before, you'll really appreciate this. It's much more customizable and very responsive, and the new version supports transparency and fade effects if that's your thing. Screenshot: Site: http://taskswitchxp.sourceforge.net Download: http://sourceforge.net/project/showfiles.php?group_id=115098&package_id=124697 I'm using the 2.0 beta. It's very stable, so don't worry about it not being a final build. Edit: Another great little addition to the beta build is instance switching. Let's say you have several Word documents open, a browser window, some IM windows etc, and you only want to switch between the Word documents. While focused on one of the documents, you can just use a key combo (I use Alt+1, since the 1 key is so close to Tab), to switch between just the MS Word instances. Very handy.