I was wondering if anybody could tell me what kind of forum platform this is? I find a lot of websites using it although nobody seems to be answering this question at Quora.



This site is¹ using Discourse (Wikipedia article), which is free/libre/open source software.

The developers tried "to reimagine what a modern Internet discussion platform should be today". It could be described as a mix between mailing lists, discussion forums, and chat rooms. See their FAQ and the features.

¹ The mentioned site contains a reference to the software in the footer, but it’s only visible if JavaScript is disabled:

Powered by Discourse, best viewed with JavaScript enabled

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