I'm looking for aproject to master and work in the field, or even just to contribute to an open source project.<p>I'm looking for ideas. For example, mastering the linux kernel, or git internals.<p>It should be something that few people truly master, and I prefer something that can land me a nice lucrative job.
<a href="http://www.dotproject.net/" rel="nofollow">http://www.dotproject.net/</a> had a very good structured php source.
I have learned a lot from it to be a better java developer. back in the old 2004's...