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If this question was asked before, kindly point me to that because the related questions box did not show me anything. I know the following are directly related to SO:

http://stackoverflow.com - Any programming questions
http://serverfault.com - Any Servers and workstations related questions
http://superuser.com - Technology related
http://meta.stackoverflow.com - Support site for stackoverflow
http://doctype.com - Perhaps anything web related

Now, I've seen other sites like this:

http://startups.com - Startup related questions
http://mathoverflow.net - All math related questions

Now, two questions:

  1. How can I find "all" sites based off the principle of StackOverflow?
  2. Are these sites (the ones I mentioned above) managed by the same technical staff or they are all new businesses relying on StackOverflow?
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3  
The best duplicate is on the stack exchange site. meta.stackexchange.com/questions/4/list-of-stackexchange-sites –  Ólafur Waage Nov 20 '09 at 0:49
    
:-O 91 sites so far!! let's see FogCreek is doing 11k / month .. not bad. –  OscarRyz Nov 20 '09 at 3:38
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@Oscar, SE is still in beta, so FogCreek are currently doing 0k/month –  Rich Seller Nov 20 '09 at 9:11
    
Well, they are laying out a very strong foundation so once they are out of beta, I can see where this is going... –  Legend Nov 20 '09 at 17:20
    
Mathoverflow is NOT for all math related questions. It's for professional/research level mathematics. Please edit this post so we can stop perpetuating that myth. –  Jason S Jan 5 '10 at 16:05

2 Answers 2

Those are companies/people that have purchased the SO model called stackexchange.

http://stackexchange.com/

It was created by the founders of SO to license out the SO model to others who wanted to create other question answer websites for other topics. They are not however part of the SO trilogy. They are customers of the SO product and supported on a customer level.

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The current set of StackOverflow-like sites can be found at http://stackexchange.com/sites

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