A semantic agent for xmpp / jabber network which finds and shares content about resources (using RDF/SPARQL) for you and your jabber friends.
An ajax web jabber client
Psi+ is a cross-platform powerful Jabber client (Qt, C++) designed for the Jabber power users.
A simple, open, server-to-server web-hook-based pubsub (publish/subscribe) protocol as an extension to Atom. Parties (servers) speaking the PubSubHubbub protocol can get near-instant notifications (via webhook callbacks) when a topic (Atom URL) they're interested in is updated.
TrophyIM is a Jabber (XMPP) client built on top of strophe
Brings all XMPP wonders to Drupal, interacting with user via javascript and plain old HTTP. Strophe javascript library is used for handling all javascript gears