Java VoIP Softphone (SIP) (replaced by jfPhone)
An open source 3GPP LTE implementation.
Positional Audio Communication for Minecraft with Mumble
Frontend for ModemManager 0.6/0.7, Wader and oFono
Java wrapper for the popular chat & VOIP service
http://www.vaakpbx.com
AT commands as input are sent to modem and responses given as output.
Java VoIP/SIP PBX system (replaced by jfPBX)
Enterprise telephony recording and retrieval system
VoIP/SIP SoftPhone (formerly known as jphonelite)
Go to github.com/vlm/asn1c for the latest version.
Open source Fax server software for inbound / outbound internet Faxing
High performance, production quality STUN server and client library