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ejabberd is a distributed, fault-tolerant technology that allows the creation of large-scale instant messaging applications. The server can reliably support thousands of simultaneous users on a single node and has been designed to provide exceptional standards of fault tolerance. As an open source technology, based on industry-standards, ejabberd can be used to build bespoke solutions very cost effectively.
Distributed server for social and realtime games and apps. Build scalable games and apps with a production ready server used by ambitious game studios and app developers all around the world. Have a look at the documentation and join the developer community for more info.
It is a great solution for communities and companies wanting to privately host their own chat service or for developers looking forward to build and evolve their own chat platforms. Its features include File sharing, Video conferencing, Screen sharing, Live chat, Link preview and lot more.
Mattermost is an open source platform for secure collaboration across the entire software development lifecycle. It is as an alternative to proprietary SaaS messaging, Mattermost brings all your team communication into one place, making it searchable and accessible anywhere.
Mumble is a cross-platform voice over IP application. It is a client - server application where multiple users could use the same server and all their communication is encrypted. It could be used while gaming. It does audio video recording.
0fc enables you to run a secure in-browser group chat with isolated chatrooms. Server is considered minimal trusted zone, all important operations happen on client side. Ephemeral keys used to protect chat room traffic are generated within room owner's browser and propagated to the rest. It is built on top of built on top of Themis crypto library.
Niltalk is a web based disposable chat server. It allows users to create password protected disposable, ephemeral chatrooms and invite peers to chat rooms. Rooms can be disposed of at any time. It supports in-memory / file / Redis as the backend for persisting room and session states.
Friends is like Slack except P2P, offline friendly and open source. Data is transmitted over secure channels and messages are authenticated. It is made by a group of open source developers who are motivated to make a public chat platform that is easy to use but isn't centrally controlled, and where data is owned by its users.