Progopedia is a free (GNUFree Documentation License) web-based encyclopedia of programming languages.
No thank you!
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Anonymous2011-04-13 11:47
We prohibit anonymous articles editing and approve new editors by hand. We understand that this policy will lead to fewer users and articles and less frequent updates, but we believe that it's a fair price for our goals: ideally we want articles to be written by professionals and experts, and we don't want people to avoid citing Progopedia as a source because article content can be changed any moment by anonymous spammer or vandal.