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A WebRTC-Enabled Chrome Extension for Seamless Call Center
Unified Communications System - PBX System
Java VoIP Softphone (SIP) (replaced by jfPhone)
High performance, production quality STUN server and client library
Asterisk based VoIP pbx appliance
ERP, IP PBX, Accounting, CRM, Time tracking, and etc.
H.323 Gatekeeper for VoIP and videconferencing
Microscopic AGI framework.
Webface witch extract CDR (Call Detail Records) from MySQL base.
VozBox. Asterisk VoIP PBX.
Open source streamlined SIP client built on Linphone
Baresip is a modular SIP User-Agent with audio and video support
Optimized and cross platform SMPTE 2022 FEC library in C, Python, Java
The OZEKI VoIP Service Checker allows you to check VoIP services.
Client VoIP for Windows Mobile
Respins of various open source PBX projects