The missing bridge between Java and native C++
Jitsi is an audio/video and chat communicator that supports protocols
Java VoIP Softphone (SIP) (replaced by jfPhone)
Accent interfaces and controls systems through goals and policies
Enterprise telephony recording and retrieval system
Data reduction and imaging for select astronomical cameras
SIP Video Multiconference Media Server with WebRTC support.
Java VoIP/SIP PBX system (replaced by jfPBX)
SIP2 Library for Java.
Capture and display SIP and DIAMETER messages
Open source streamlined SIP client built on Linphone
Java API for Invoking Web Services dynamically.
A suite of open-source tools and frameworks for creating SIP apps