Converse.js is an instant messaging client for websites. It provides an entirely browser-based Jabber/XMPP interface, and can connect to any XMPP public server. Converse implementes single and multiuser chats, invitations, service discovery, direct registration, contact lists, roosters and vCard exchange, status changes and messages, typing and state notification, and OTR encryption.
Prosody is a modern XMPP communication server. It aims to be easy to set up and configure, and efficient with system resources. Additionally, for developers it aims to be easy to extend and give a flexible system on which to rapidly develop added functionality, or prototype new protocols.
profanity-blink is a plugin for the profanity XMPP client to blink an LED on incoming messages. It currently supports the ThinkLight LEDs on ThinkPad laptops as well as the blink(1) USB LED.