Piefed
Piefed is an fediverse open-source alternative to reddit similar to Lemmy written in Python. That has built in features such as comment consolidation, polls, flairs, categories and topics. The project was conceived by Rimu Atkinson.
References
https://codeberg.org/rimu/pyfedi
https://alternativeto.net/software/piefed/about/
https://news.elenarossini.com/the-future-of-social-is-here-a-show-and-tell-part-4-lemmy-piefed-mbin/