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
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 fast cross-platform FTP client
Document Management System and Content Management System
A universal instant messaging (IM) program
The portable software collection
Qt based GUI tool designed to create and edit .torrent files
An intranet chat application that does not require a server.
Psi+ Project — development branch of Psi XMPP client
Psi IM — Qt-based XMPP client
Unified Communications Server
Search, Download, Play, Share on Bittorrent and the cloud
Real time satellite tracking and orbit prediction
Open Source Enterprise Content Management ECM
A free peer-to-peer (P2P) BitTorrent file sharing client
Low-latency, high quality voice chat for gamers
A multi-protocol & multi-source, cross platform download utility
The pinnacle of file-sharing and chat - an innovative DC client!