OSS Sip phones:

http://www.qutecom.org/

http://sip-communicator.org/

http://www.ekiga.org/

http://www.xs4all.nl/~mfnboer/twinkle/index.html

http://thecoccinella.org/ Open Source Whiteboard

More open source help wanted sites:

http://savannah.gnu.org/people/

Help translate ubuntu:

https://translations.launchpad.net/ubuntu

https://gna.org/people/

Want to help open source software out? Don't feel like coding?

Check the help wanted section!

http://sourceforge.net/people/

Gross Pictures OSes

http://sam.zoy.org/lmos/ Last Measure Operating System

http://www.kolumbus.fi/xtmb/goatsefloppy/ Goatse Floppy

http://www.iro.umontreal.ca/~felipe/IFT2030-Automne2002/Complements/tiny...

Tiny-C compiler