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 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
Document Management System and Content Management System
The portable software collection
Psi IM — Qt-based XMPP client
Psi+ Project — development branch of Psi XMPP client
A free peer-to-peer (P2P) BitTorrent file sharing client
Powerful Open Source Email Marketing app with analytics & segmentation
A multi-protocol & multi-source, cross platform download utility
Qt based GUI tool designed to create and edit .torrent files
forma.lms is a Learning Management System (LMS), opensource lms
The most affordable CRM system according to Capterra
Standalone chat system developed in php, mysql and javascript
A fast cross-platform FTP client