Stack Overflow

stack overflow, part of stack exchange , is a free, community-driven, reputation-based q & a site for computer programmers.

Free Android iPhone Web

Stack Exchange

Stack Exchange is a fast-growing network of 84 [and counting] question and answer sites on diverse topics from software programming to cooking to photography and gaming.

Free Android iPhone Android Tablet iPad Web

Quora

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 there can be a summary answer.

Free Android iPhone Web

Super User

super user, part of stack exchange , is a q&a site for computer enthusiasts that's free.

Free Web

Yahoo! Answers

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.

Free Web

askalo

In May 2017, askalo was relaunched as a free classifieds search engine for cars, jobs and real estate. The new askalo is available in a public beta version.

Free Web

OSQA

OSQA is the free, open source Q&A system you've been waiting for. Your OSQA site is more than just an FAQ page, it is a full-featured Q&A community.

Free Open Source Web Self-Hosted Django Python

Shrtct

Shrtct is a productivity tool for teams, providing in-context communication (chit chat free!) via Shrtct Hashes.

Free Personal Web

Bitfortip

Bitfortip offers a unique use case thanks to Bitcoin. Use Bitfortip to: Find a item (i.e. a dress ) that you saw on a magazine,website, Pinterest or Instagram and you don't know where to buy it online.

Free Android Web

Wiki Answers

Answers.com: Wiki Q&A combined with free online dictionary, thesaurus, and encyclopedias. Ask questions, get answers.

Free Web

Answers

Answers is the place to go to ask questions and receive answers from the community at large on any topic. Connect with people who know the answers to your questions...

Free iPhone

NALIJ

Have great conversations with the right people. One forum for all your interests. Post about anything and everything you like! Whether you're an expert or a...

Free Web