GNUnet

Software framework for decentralized, peer-to-peer networking.

Discover more

Fast, scalable, enterprise mail/groupware server providing ESMTP, IMAP, POP3, webmail, mailing list, basic web-based calendaring and scheduling services.

Communication GPL-3.0 C deb

6/5/2026 Details →

Exim

Message transfer agent (MTA) developed at the University of Cambridge.

Communication GPL-3.0 C deb

6/5/2026 Details →

Janus

General-purpose, lightweight, minimalist WebRTC Server.

Communication GPL-3.0 C

6/5/2026 Details →

Piler

Feature-rich email archiving solution.

Communication GPL-3.0 C

6/5/2026 Details →

Tox

Distributed, secure messenger with audio and video chat capabilities.

Communication GPL-3.0 C

6/5/2026 Details →

Weechat

Fast, light and extensible chat client.

Communication GPL-3.0 C Docker deb

6/5/2026 Details →