Stack Exchange

Quora.com is a question/answer service allowing users to pose questions that other users can answer, each question and answer can have comments, each users can write one individual answer and …

Yahoo! Answers is a way to find and share information. You can ask questions on any topic, get answers from real people, and share your insights and experience.

Open source question and answer forum written in Python and Django

Shapado is an open source question-answer system written in Ruby, Mongomappe and Mongodb

The Mission Our patented knowledge-sharing process, combined with the advantages of the Internet, allow us to change the way people solve their technology problems, gather information and share knowledge. The …

A Q&A site helps an online community to share knowledge. No matter what your area of interest, people with questions can get super answers fast. Question2Answer is a popular Q&A …

Social Q&A network! Send and receive anonymous questions, and find out what others think about you.

Twithelp™ lets you use the huge Twitter community to get help with anything you want - simply and quickly. You can also help other people with things you know about, …

Amazon's Askville is a community where people love helping others by answering questions.

Solace is a fully open-sourced multilingual support and knowledge exchange platform written in Python.

Coordino allows you to create a question and answer system for you and your users to enjoy. Whether you are looking to create a niche question and answer site for …