Movim
Movim is a free and open source social and chat platform that acts as a web interface for the XMPP protocol
Software for working on the Internet.
Movim is a free and open source social and chat platform that acts as a web interface for the XMPP protocol
Retroshare is a free and open source, multi-platform platform for the confidential exchange of files and messages via an encrypted Friend-to-Friend network
Jami is a free and open source, cross-platform, privacy-oriented voice, video, chat, and conference platform
Jitsi Meet is a free and open source, multi-platform software for secure, simple, and scalable video conferences
qTox is a free and open source instant messaging client with support for text, voice, and video chats, using the encrypted Tox protocol
Gajim is a free and open source, multi-platform, easy-to-use, and full-featured XMPP client
Mailspring – free and open source, multi-platform fast desktop mail client
KMail is a free and open source email component of Kontact, an integrated personal information manager from KDE
Sylpheed is a free and open source, multi-platform, simple and lightweight email client
Evolution is a free and open source application for managing personal information: mail, contacts, calendar, tasks, and notes