Have you considered Discourse? It isn't a true Q/A platform like Stack Overflow or Quora, but if you treat the initial post a question and the replies as answer

Have you considered Discourse? It isn't a true Q/A platform like Stack Overflow or Quora, but if you treat the initial post a question and the replies as answers it works. Also, this guy claims to have written a plugin that gives it Q/A functionality: https://meta.discourse.org/t/is-discourse-suitable-for-use-for-a-question-and-answer-type-page/17772/2 https://meta.discourse.org/t/is-discourse-suitable-for-use-f...