Browse free open source Communications software and projects below. Use the toggles on the left to filter open source Communications software by OS, license, language, programming language, and project status.
WinSCP is a free SFTP, SCP, S3, WebDAV, and FTP client for Windows.
A free and reliable P2P BitTorrent client
A free peer-to-peer (P2P) file sharing client
An extremely powerful and configurable BitTorrent client
A Windows client for the Direct Connect networks
A fast cross-platform FTP client
A universal instant messaging (IM) program
Document Management System and Content Management System
The portable software collection
An intranet chat application that does not require a server.
Psi+ Project — development branch of Psi XMPP client
A free peer-to-peer (P2P) BitTorrent file sharing client
Search, Download, Play, Share on Bittorrent and the cloud
Low-latency, high quality voice chat for gamers
forma.lms is a Learning Management System (LMS), opensource lms
RSS Owl is a powerful application to organize, search and read feeds.
Standalone chat system developed in php, mysql and javascript
Zentyal is a Linux Small Business Server