As reader of Planet Ubuntu might now, the nice porgram vrms from the self-named packed shows how (un-)free your system is. Mine:
21:53:49 blizzz@xara:~$ vrms
Non-free packages installed on xara
fglrx-modaliases Identifiers supported by the ATI graphics driver
latex2html LaTeX to HTML translator
nvidia-96-modaliases Modaliases for the NVIDIA binary X.Org driver
opera The Opera Web Browser
rar Archiver for .rar files
selfhtml German HTML reference and tutorial
sun-java6-bin Sun Java(TM) Runtime Environment (JRE) 6 (architecture
sun-java6-jre Sun Java(TM) Runtime Environment (JRE) 6 (architecture
sun-java6-plugin The Java(TM) Plug-in, Java SE 6
umtsmon Dieses Paket beinhaltet den UMTSMonitor fuer o2.
unrar Unarchiver for .rar files (non-free version)
Non-free packages with status other than installed on xara
linux-restricted-modules- ( dei) Non-free Linux 2.6.28 modules helper script
Contrib packages installed on xara
flashplugin-installer Adobe Flash Player plugin installer
flashplugin-nonfree Adobe Flash Player plugin installer (transitional pack
msttcorefonts transitional dummy package
ttf-mscorefonts-installer Installer for Microsoft TrueType core fonts
Contrib packages with status other than installed on xara
openttd ( dei) reimplementation of Transport Tycoon Deluxe wi
12 non-free packages, 0.5% of 2369 installed packages.
5 contrib packages, 0.2% of 2369 installed packages.
It could be less without any problems, since i my notebook is intel based so the auto installed nvidia- and ati-stuff are meaningless. Didn't know that selfhtml is unfree, and well, i even forgot that i have those MS TT fonts installed.