An asynchronous event driven PHP socket framework. Supports HTTP, Websocket, SSL and other custom protocols. PHP>=5.3....
The EventDispatcher component provides tools that allow your application components to communicate with each other by dispatching events and listening to them....
The Doctrine Event Manager is a library that provides a simple event system.
Attendize is an open-source ticket selling and event management platform built on Laravel.
A set of event dispatcher abstractions extracted out of the Symfony components
Implement event systems, signal slots, intercepting filters, and observers.