The Extensible Messaging and Presence Protocol, which underlies Jabber and PubSub.

Category Link Notes
RFCs RFC:3920 Protocol Core
RFC:3921 Instant Messaging and Presence
RFC:3922 Mapping the to Common Presence and Instant Messaging
RFC:3923 End-to-End Signing and Object Encryption
Servers Strophe includes a JavaScript library.
Prosody A server written in Lua that supports conference rooms and external authentication methods.

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