Virtual Dub: A great program for video capture. It can acctually capture straight to DivX format. Its also a sourceforge.net project so it's completely open source as well, which is a nice bonus if you know how to program. Of course, you have to have a video capture device on the computer.
http://www.virtualdub.org/
Mozilla Thunderbird: I saw people mention it, but for those who aren't sure what it is, it's simply an alternative to OE or Outlook, as well as being completely open source like Firefox.
https://www.mozilla.org/en-US/
Red Hat Fedora Linux Yet another open source alternative. This operating system is acctually programmed by people like you and me, even though the final editors say does go to the guys at Red Hat, theyve been doing great work for years and it seems to work out ok. There is a little bit of a learning curve, especially if your a windows veteran, but with a little bit of time and patience youll be able to sort it out in no time. Unfortunately, not everything will work on linux, but most people are definetly seeing linux as a more serious alternative, and consequently develop a linux version of their software. While I personally have had issues with installing Fedora Core 3, I am currently using Core 2, and have no complaints.