What is the name of this forum thingy app

What is the name of this forum thingy app?
Beacuse this this /u url is used on different sites and this theme too the discobot and many more things
Can anyone tell me the name of this app used on this site? :slightly_smiling_face:

sorry if my english is bad

It’s Discourse, which is open source, customisable, and free to use.

Hope that answers your question. :slight_smile:

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thank you

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