What was the name of the Web Site?

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http://stackoverflow.com – I remember a few monts ago, I visit a high quality web site. If I remember, I learned that site from github. In the site, you can build your own linux server with all featers like Ram, HDD, CPU etc. It was very expensive site but; when you select minimal feature for all, it was free. And this site not for just a host site. The site was like some kind of a developer site. It was have got lots of software options and settings. You can reach the your free server futures with a kind of CMD screen. Probebly this web site must be a populer site. The quality of the web site like GOOGLE, FACE (HowTos)