Well, the Python Twisted framework (http://twistedmatrix.com/trac/ http://twistedmatrix.com/trac/) can always use more people and is one of the bigger and more

Well, the Python Twisted framework (http://twistedmatrix.com/trac/ http://twistedmatrix.com/trac/) can always use more people and is one of the bigger and more awesome open source projects. In addition (in my experience) most of the code is very modular, clean and understandable.