VICIdial Contact Center Suite
Browse on Tor / i2p - Anon p2p Chat / FileTx, Conf / Video VoIP
Web based system for Computer Assisted Telephone Interviewing (CATI)
Open source streamlined SIP client built on Linphone
JavaUCP is an SMS client for UCP transport
A client management, billing and e-commerce solution
Client VoIP for Windows Mobile
client-server full java chat audio-video file sharing