Q&A Open Source Platform
If you need a simple open source Q&A solution for your website, give Question2Answer a try. This is a dedicated question and answer solution and not just a simplified forum. It features a five minute install, easy CSS themes, search engine, e-mail notifications, voting, comments and follow-up questions, categories and tags and is scalable to millions of posts. This question and answer software is licensed under GNU GPL. According to the site the Q&A platform has been installed over 1000 times.
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