Wiki Answers - Answers.com: Wiki Q&A combined with free online dictionary, thesaurus, and encyclopedias.
The Answer Bank - The Answer Bank is the UK’s leading question-and-answer site.
askalo - In May 2017, askalo was relaunched as a free classifieds search engine for cars, jobs and real...
wikiHow - wikiHow is a wiki based collaboration to build the world’s largest, highest quality how to manual.
Fluther - Question and answer service based on user profiles and a user score.
AllAnswered - Your Team's Collective Brain All-In-One Knowledge Management System Wiki + Q&A + Workflow + AI