OpenH323 official site
http://www.openh323.org/
GNUGK Resource (Good)
http://sniff.vicp.net/archives/2004_06.html
http://www.gnugk.org/
OpenSSL VoIP Forum
http://openssl.cn/
http://openssl.cn/program.asp?program_id=5
Huihoo Forum --- Mobile, Communication, Telecom Open Source Code
http://www.huihoo.org/forum/index.php
http://www.huihoo.org/forum/forumdisplay.php?fid=103
Your Source for Open Source Communication
http://www.vovida.org/
Open Source Voip
http://www.voxgratia.org
