Free Communication Software for Linux

Dada Mail is a supported, contemporary, completely free and open source web-based software project that provides a general purpose mailing list manager, which can be easily deployed on any GNU/Linux server machine and used inside your organization to send...

ejabberd is an open source, multi-platform, scalable, distributed, administrator-friendly, easy to setup and fault-tolerant Jabber and XMPP (Extensible Messaging and Presence Protocol) server that supports IPv6 and virtual hosts. It is written in...

Exim is an open source, cross-platform and freely downloadable command-line software project that has been designed from the offset to act as a MTA (Message Transfer Agent) for GNU/Linux and UNIX-like operating systems. It is targeted mainly at Internet...

S-nail is an open source and completely free command-line software, a mail processing system, as well as an extended version of the mailx software especially designed for POSIX operating systems, including GNU/Linux. Features at a glance Key features...

Claws Mail is an open source software project that has been designed from the ground up to act as a lightweight email client application suitable for Linux-based operating systems that use a lightweight window manager/desktop environment. It is was...

Openfire is an open source, completely free, open protocol, multiplatform, enterprise grade and easy-to-use Real Time Collaboration (RTC) server that uses the Extensible Messaging and Presence Protocol (XMPP), also known as Jabber protocol for...

Sympa is a scalable, open source, internationalized, free and highly customizable mailing list application implemented in Perl and engineered to handle big lists, with over 700,000 subscribers. It offers a complete web-based interface for both the...

Polari is an open source application that provides users with one of the most easy to use and uncomplicated IRC (Internet Relay Chat) client that was ever created for the GNOME desktop environment. The application lets users to easily join IRC channels,...

ScopServ-VoIP is an open source, freely distributed, easy-to-use, powerful and portable web-based GUI (Graphical User Interface) management interface that lets users easily and quickly configure the state-of-the-art Asterisk telephony engine and PBX...

GNU SIP Witch is an open source, free, cross-platform and secure SIP (Session Initiation Protocol) based office telephone call server that supports Linux, BSD, Solaris, Microsoft Windows and Mac OS X operating systems. It is part of the GNU Telephony...