Concurrence is a framework for creating massively concurrent network applications in Python. It takes a Lightweight-tasks-with-message-passing approach to concurrency. The goal of Concurrence is to provide an easier programming model for writing high performance network applications than existing solutions (Multi-threading, Twisted, asyncore etc). Concurrence uses Lightweight tasks in combination with libevent to expose a high-level synchronous API to low-level asynchronous IO. http://opensource.hyves.org/concurrence/