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
A universal P2P file sharing client for Windows
You can message and share files inside your intranet without a server.
Simply explore your Android phone!
A Windows client for the Direct Connect networks
A universal instant messaging (IM) program
The portable software collection
Psi IM — Qt-based XMPP client
Psi+ Project — development branch of Psi XMPP client
Unified Communications Server
A free peer-to-peer (P2P) BitTorrent file sharing client
Real time satellite tracking and orbit prediction
Low-latency, high quality voice chat for gamers
The pinnacle of file-sharing and chat - an innovative DC client!
Qt based GUI tool designed to create and edit .torrent files
Standalone chat system developed in php, mysql and javascript
forma.lms is a Learning Management System (LMS), opensource lms
Program for filesharing using Direct Connect and ADC protocols
Simple, web-based address & phone book