 Link | Image | Website | Description | Who uses the site? | Topics | User reputation system | Related questions | Related video | Tag assignments | Ratings for question | Ratings for comments | Summary | Follow questions | Follow topics | Follow members | Post a Message to Your Followers | Ability to edit question (modify) | Ability to suggest edits to answers | Email notifications | Search box autocompletes | Saves drafts of posts | Revert modifications | Real-time updating | Statistics | Volunteer moderators | Time-boxed conversations | Advertisements | Technology platform used for other sites | Content license / Terms | Identity system | Like | Last update |
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| Quora |  | quora.com | Quora is a question and answer site focused on getting really high quality, authoritative content on any topic that people are interested in. | "Elite": Tech pundits, entrepreneurs, early adopters, bloggers, marketers, social media mavens. | General topics and discussion | No | Yes | No | Yes Topic assignments | Yes | Yes | Yes Answers summary | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes viewed, latest activity, followers | No | No | No | No | Terms: do not modify the Content, put a link to Quora website to use content, keep update content with the latest version on quora. | Facebook, Twitter | Likes 3 | Apr. 12th 2021 8:05:48 PM |
| StackOverflow |  | stackoverflow.com | This is a collaboratively edited question and answer site for professional and enthusiast programmers. It's 100% free, no registration required. There are other sites for other topics, such as Photography, DIY, Cooking, Gaming etc.. See stackexchange.com for a full list of the current sites. | Developers, programmers, experts and enthusiasts. Other site have experts and enthusiasts in their domain. | Technical programming issues. Issues relevant to the domain for the other sites in the network. | Yes scores, badges | Yes | No | Yes | Yes up or down | Yes up or down | Yes Summary appears at tooltip | Yes Via RSS feeds on each question | Yes via RSS feeds on tags | No People aren't the focus of the sites, the questions and answers are. | No | Yes Anybody can suggest edits (subject to approval). Users with 2K+ rep can make edits straight away. | Yes Anybody can suggest edits (subject to approval). Users with 2K+ rep can make edits straight away. | Yes Tick the box at the bottom of your question. | No | Yes A single draft of a question or answer is saved | Yes Edits can be rolled back to any previous version by anyone with edit rights. | Yes | Yes asked, viewed, latest activity | Yes Voted on by the rest of the community | No | Yes Reduced for users with more than 200 rep | Yes http://stackexchange.com/ | Open data: CC-by-SA license (free to Remix, to reuse with attribution link) | Google, Yahoo, Myopenid, Facebook, AOL, Blogger, LiveJournal, Wordpress, Verisign, Openid, ClaimID, ClickPass, Google Profile, Stackoverflow account. | Likes 3 | Mar. 6th 2011 5:53:36 PM |
| TED conversations |  | ted.com/... | A social media platform that connects people for conversation, collaboration and debate. The platform gives people access to engage notable TED speakers, and the broader TED community, in conversations that -- for the first time on a social network -- have a time limit. | TED speakers and community (engaged, intellectually curious members) | General topics and discussion but mainly focused on all important problems to solve around the world... | Yes TEDCred scores, TEDCred medals, and badges | No | Yes Related TED Talks | Yes | Yes vote for great conversation | Yes | Yes Discussion summary | No | No | No | No | No | No | No | No | No | No | No | No | Yes | Yes Whether it's one day or one month, TED Conversations are assigned an expiration date to keep the discussion sharp and on-topic | Yes | No | Creative Commons 3.0 (Attribution-NonCommercial-NoDerivatives) license: attribute the conversation; noncommercial use only; and no derivative works. | TED account | Likes 0 | Feb. 21st 2011 11:47:20 PM |
| Yahoo Answers |  | yahoo.com | Yahoo! Answers is a place where people ask and answer questions on any topic. Why not share your facts, opinions and personal experiences with the Yahoo! Answers community? | Everybody | General topics and discussion | Yes points, levels, statistics | Yes | No | No | Yes mark question as interesting | Yes up | No | Yes private watchlist | No | No | No | No | No | No | No | No | No | No | Yes not really.. only number of personal questions and answers | No | No | Yes | No | Yahoo copyright | Yahoo, Facebook, Google | Likes 0 | Feb. 21st 2011 11:47:20 PM |
| AskOpinion | askopinion.com | websites are for everyone from beginners to advanced users | general topics discussions tips | Yes | Yes | No | Yes | Yes | Yes | Yes questions, answers | Yes | Yes | Yes | Yes | Yes | Yes | Yes | No | Yes | No | Yes | No | No | No | No | facebook , twetter | Likes 0 | Apr. 12th 2021 8:10:05 PM |