http://www.kanasolution.com/index.php?fid=11&pid=2 (updated link)

This is not just a reminder program, but can run other programs as well. For example, every weekday I have a reminder with this under Options:

"C:\Program Files\Winamp\winamp.exe" http://war.str3am.com:7830/listen.pls

Recognize that? It starts up Winamp (your path may be different) with the Computer Outlook show stream.

Here's another one:
"C:\Program Files\Avant Browser\avant.exe" http://www.computeroutlook.com/chat.php

This one starts up the chatroom, using the Avant browser. I could just as easily have used Firefox or any other browser.