proprietary-sw check
I just audited my system at home for installed non-free software. Here's the list:
- IBM JDK 1.3.0
 - Sun JDK 1.4.2
 - Maple 9
 - Adobe Acrobat Reader 5.0
 - RealPlayer 10 v0.3.0.120
 - mp3 plugins for xmms, rhythembox; as well as mpg123
(In the sense that these are encumbered by patents) - Evil codecs for mplayer/xine.
 - Quake III