“The concept of a user-driven FAQ or question-and-answer service
has been around for years already, but it has really taken off
recently with the success of commercial sites like StackOverflow
and Quora. But if your company or project wants to run an in-house
Q&A service for your users and developers, you don’t need to
write a custom solution, just turn to Coordino.The open source Coordino package is designed to serve up a
fast-and-flexible Q&A site running on MySQL and PHP, complete
with a voting system, user reputations, and spam-prevention.