If you’re a Windows Vista user, you will probably be interested in this.  Microsoft is maintaining a list of Windows Vista compatible applications that have earned the “Certified for Windows Vista� logo or the “Works with Windows Vista� logo, which is currently around 800 or so.  Apparently, this list will be updated weekly, so I recommend bookmarking it for future reference if you use or plan on upgrading to Windows Vista

Source:http://kylescove.com/2007/02/26/800-windows-vista-compatible-applications/