Converse.js - a free and open-source XMPP chat client that runs in a web browser

[jdaviescoates]

https://conversejs.org/
https://github.com/conversejs/converse.js

[murgero]

@jdaviescoates If you just want the client - this can be installed right now on the LAMP apps. Conversejs is just javascript and html files without the server.