Twisted with Wokkel (https://github.com/ralphm/wokkel https://github.com/ralphm/wokkel). It looks unmaintained, but a Python 3 port is on its way, and we are us

Twisted with Wokkel (https://github.com/ralphm/wokkel https://github.com/ralphm/wokkel). It looks unmaintained, but a Python 3 port is on its way, and we are using it actively SleekXMPP (http://sleekxmpp.com/ http://sleekxmpp.com/) and it's asynchronous fork Slixmpp (https://pypi.python.org/pypi/slixmpp/1.1 https://pypi.python.org/pypi/slixmpp/1.1)