The one microsoft application I always come back to because it’s actually the best offering in its field is Visio. There are replacements, but they don’t fill in any missing gaps or fix broken functionality - they’re just replacements. There is, however, one thing missing from my Visio, and that’s being able to share it easily. I like this site: http://www.drawanywhere.com because I can quickly whip up a diagram and share it publicly or turn it into a PDF. The best part is there’s no software to download or install.
One less reason to keep a rdesktop session open to a Windows terminal server. My only reason left is Outlook, but with mapi support maturing in Evolution, the terminal server’s days are numbered.