Netty project - an event-driven asynchronous network application framework

Networking framework for .net

Event-driven, non-blocking I/O with PHP

A component-based, event-driven JavaScript framework from Twitter

Event-driven OS kernel built on V8 JavaScript engine

The sorta-official libevhtp chat.

Library for using a readable blocking-like syntax with event-driven Javascript code

Bring your Backbone applications to life with an event-driven Command framework.

MeteorCode Pathway - an open-source event-driven game engine for the JVM

Event-driven HTML5 Parser in Javascript