VoIP/SIP SoftPhone (formerly known as jphonelite)
open5g is an open source implementation of the 3GPP 5G specifications.
An open source 3GPP LTE implementation.
Java VoIP Softphone (SIP) (replaced by jfPhone)
High performance, production quality STUN server and client library
SIP Video Multiconference Media Server with WebRTC support.
This is a 4G LTE mobile phone based on Android OS, Ice Cream Sandwich.