Linphone is an internet phone or Voice Over IP phone (VoIP). > Website > Download > Changelog > SCM Tree > Screenshots > Mailing Lists
Tagged: Voice Conferencing
Jitsi is an audio/video Internet phone and instant messenger written in Java. It supports some of the most popular instant messaging and telephony protocols such as SIP, Jabber/XMPP (and hence Facebook and Google Talk),...
Skype provides Voice Conferencing, Video Conferenceing and Instant Messaging. > Website > Download
Blink is the best real-time communications client using SIP protocol. > Website > Download > Changelog > Screenshots