Browse free open source VoIP software and projects for Linux below. Use the toggles on the left to filter open source VoIP software by OS, license, language, programming language, and project status.
Issabel PBX - Unified Communications
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
Modern, AI-Smart, WASTE p2p for ipv4, Tor and i2p + Voice Conference.
Java wrapper for the popular chat & VOIP service
http://www.vaakpbx.com
OpenSource Call Center and Dialer System
Baresip is a modular SIP User-Agent with audio and video support
SIP Video Multiconference Media Server with WebRTC support.
High performance, production quality STUN server and client library
vTiger Freeswitch PBX Integration