This is not an exact answer to your question and I have not tried this one, but Postmill [1] is similar to HN and phpBB [2a] is an off the shelf forum platform

This is not an exact answer to your question and I have not tried this one, but Postmill [1] is similar to HN and phpBB [2a] is an off the shelf forum platform with incredible moderator capabilities but I think an add-on/extension [2b] is required for voting. the linked addon is closer to github style reaction voting Some have suggested that Lemmy [3a][3b][3c] is an alternative to Reddit but I have never tried it. An alternative to Lemmy appears to be Kbin [4a][4b]. I've never run either of those. [Edit] Found another called Strimoid [5a][5b] Excluding all the other ones I found as they require javascript to browse anonymously like Mastodon. [1] - https://gitlab.com/postmill/Postmill https://gitlab.com/postmill/Postmill [2a] - https://www.phpbb.com/ https://www.phpbb.com/ [2b] - https://www.phpbb.com/community/viewtopic.php?f=456&t=2397266 https://www.phpbb.com/community/viewtopic.php?f=456&t=239726... [3a] - https://join-lemmy.org/ https://join-lemmy.org/ [3b] - https://github.com/LemmyNet/lemmy https://github.com/LemmyNet/lemmy [3c] - https://news.ycombinator.com/item?id=36376373 https://news.ycombinator.com/item?id=36376373 [4a] - https://kbin.social/ https://kbin.social/ [4b] - https://codeberg.org/Kbin/ https://codeberg.org/Kbin/ [5a] - https://strm.pl/ https://strm.pl/ [5b] - https://github.com/Strimoid/Strimoid https://github.com/Strimoid/Strimoid