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
Unified Communications Server
A simple noise gate app intended for use with VOIPs like Skype.
Open source Fax server software for inbound / outbound internet Faxing
Baresip is a modular SIP User-Agent with audio and video support
High performance, production quality STUN server and client library
H.323 Gatekeeper for VoIP and videconferencing
A suite of open-source tools and frameworks for creating SIP apps
A command line utility for remote controlling Polycom VVX IP phones
A plugin for Teamspeak3. This plugin allows you to autofollow a user.