Q&A Services

A social news website where content shared by users is voted on, organized into 'subreddits,' and can appear on the front page amid diverse topics.

Stack Overflow, part of Stack Exchange, is a free, community-driven, reputation-based Q & A site for computer programmers. No membership is required to ask questions or provide answers to questions by others.

Slant is a product recommendation community with the goal of making it effortless to find the best product, app or game for you.

People come to Quora to ask questions about any subject, read high quality knowledge that's personalized and relevant to them, and share their own knowledge with others. Quora is a place to share knowledge and better understand the world.

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. We are an expert knowledge exchange: a place where physics researchers can ask each other about quantum...

Ever had a question? Ever had an answer? Ever had knowledge to share? We believe that coming together to inquire and learn, to share knowledge and to teach each other, makes the world a better place. We also believe that Q&A communities should be free from the politics and...

Akinator the Genius can read your mind and tell you who you're thinking of by answering a few questions.

Interactive tool that makes it easy to create and host quizzes, surveys, and Q&A sessions. Ideal for educators, trainers, and speakers.

Super User, part of Stack Exchange , is a Q&A site for computer enthusiasts that's free. Free to ask questions, free to answer questions, free to read, free to index, built with plain old HTML, no fake rot13 text on the home page, no...

Curious cat is a small social networking tool that allows you to connect with your followers by providing them with the appropiate tools to communicate with you.

Learn about the tech stack behind some of the world's best software companies. See which tools and services they use, and how they're using them.

Interactive presentation software that lets your audience vote, ask questions, play quiz, and be engaged in real-time. For event hosts, public speakers, educators.

TopAnswers is what Stack Overflow should be: focused on communities and knowledge sharing, not profit. We share some of the same aims:

Neosporing is a simple Q&A social network designed for community! On Neosporing, users can create and customize their profile to look how they want, and then other users can ask them questions using their account or an anonymous username.

Scoold is inspired by StackOverflow and implements most of its features. You can ask and answer questions, upvote and downvote posts, earn badges and reputation. Each edit creates an new revision, making it easy to follow the history of edits. Scoold is optimized for the cloud.