Browse free open source Communications software and projects for Mac below. Use the toggles on the left to filter open source Communications software by OS, license, language, programming language, and project status.
A free and reliable P2P BitTorrent client
An intranet chat application that does not require a server.
Ham Radio Digital Modem Application
A universal instant messaging (IM) program
Unified Communications Server
An extremely powerful and configurable BitTorrent client
Document Management System and Content Management System
A free course management system (CMS) to create online learning sites
Real time satellite tracking and orbit prediction
Psi IM — Qt-based XMPP client
Psi+ Project — development branch of Psi XMPP client
Search, Download, Play, Share on Bittorrent and the cloud
Powerful Open Source Email Marketing app with analytics & segmentation
Open Source Document Management System
The best free media player for video and DVDs
Qt based GUI tool designed to create and edit .torrent files
Low-latency, high quality voice chat for gamers
To-do manager, notepad, RSS reader...
An intuitive, multi-language and cross-platform IPTV player