Browse free open source VoIP software and projects for BSD below. Use the toggles on the left to filter open source VoIP software by OS, license, language, programming language, and project status.
VoIP SIP and SKINNY quality analyzer and packet / audio recording tool
A simple noise gate app intended for use with VOIPs like Skype.
Unified Communications Server
Java VoIP/SIP PBX system (replaced by jfPBX)
A suite of open-source tools and frameworks for creating SIP apps
High performance, production quality STUN server and client library
Baresip is a modular SIP User-Agent with audio and video support
H.323 Gatekeeper for VoIP and videconferencing
Open source Fax server software for inbound / outbound internet Faxing
VoIP/SIP Autodialer
SIP softphone
Microscopic AGI framework.