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 peer-to-peer (P2P) file sharing client
An extremely powerful and configurable BitTorrent client
You can message and share files inside your intranet without a server.
A universal P2P file sharing client for Windows
A Windows client for the Direct Connect networks
A universal instant messaging (IM) program
A free course management system (CMS) to create online learning sites
The portable software collection
Qt based GUI tool designed to create and edit .torrent files
Psi IM — Qt-based XMPP client
Psi+ Project — development branch of Psi XMPP client
Real time satellite tracking and orbit prediction
Unified Communications Server
A free peer-to-peer (P2P) BitTorrent file sharing client
Low-latency, high quality voice chat for gamers
The pinnacle of file-sharing and chat - an innovative DC client!
forma.lms is a Learning Management System (LMS), opensource lms
for Adium, Pidgin, Miranda and Telepathy IM Framework
Cellular manager for mobile phones/modems