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, project status, and freshness.
An easy-to-use anti-spam email gateway
Anti-Spam SMTP Proxy Server implements multiple spam filters
A free and reliable P2P BitTorrent client
WinSCP is a free SFTP, SCP, S3, WebDAV, and FTP client for Windows.
A free peer-to-peer (P2P) file sharing client
Open source software for live streaming and recording
Protects you from spam mails and virus mails effectively with milter
Hewlett-Packard's Linux imaging and printing software
An intranet chat application that does not require a server.
Icecast and Shoutcast broadcasting client
Sync Outlook contacts and calendars with Google
A Windows client for the Direct Connect networks
A faster, leaner email client and fork of Nylas Mail
Network video device management software
Serial and TCP terminal for engineering and debugging
Screen capture, file sharing and productivity tool
Travel light, run fast, just works! Devuan powered!
A universal P2P file sharing client for Windows
Ham Radio Digital Modem Application
Issabel PBX - Unified Communications
Windows eml and mbox viewer.
Windows tray utility / filesystem watcher / launcher for Syncthing