Blogroll for tag voip

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Twinkle - A SIP softphone for Linux
Zimbra - An innovative open source messaging and collaboration application
Gizmo Project - An Internet phone application blends with IM (YM, GoogleTalk, WindowsLive)
Linphone - A SIP VoIP client for Linux
Ekiga - An open source VoIP and video conferencing application for GNOME
Aikido, Retreat or War. What’s your Microsoft strategy? (Alec Saunders .LOG)
OpenWengo - A softphone which allows making free PC to PC video/voice calls, with IM, SMS support
SIPfoundry - A open source SIP based IP PBX, Nortel's product is also based on this
fring - A mobile client for Skype, MSN Messenger, ICQ, Google Talk, SIP & Twitter
Can Ribbit Finally Bring Web & Voice Together? (GigaOM)
Ribbit - A new kind of "phone company" that provide a platform to build and use the service the way user/developer like it.
ASTFIN - A uClinux based Asterisk distribution
Gizmo5 - A skype-like free internet calls service using standard protocol like SIP and XMPP
How Many Voice Calls Can You Squeeze Into 1 MHz? (WirelessMoves)
Make Free VoIP Calls from Google Voice