Java VoIP Softphone (SIP) (replaced by jfPhone)
Accent interfaces and controls systems through goals and policies
A simple noise gate app intended for use with VOIPs like Skype.
Universal Framework to audit Voip protocols's security
The OZEKI VoIP Service Checker allows you to check VoIP services.
A P2P Messenger which uses JXTA. It provides secure RSA/AES end-to-end
client-server full java chat audio-video file sharing