https://tildes.net https://tildes.net (source: https://gitlab.com/tildes/tildes https://gitlab.com/tildes/tildes, github mirror: https://github.com/spectria/til

https://tildes.net https://tildes.net (source: https://gitlab.com/tildes/tildes https://gitlab.com/tildes/tildes, github mirror: https://github.com/spectria/tildes https://github.com/spectria/tildes, Python back-end, made by dude who worked on old reddit) https://lobste.rs https://lobste.rs (source: https://github.com/lobsters/lobsters https://github.com/lobsters/lobsters, Ruby back-end) https://lemmy.ml https://lemmy.ml (source: https://github.com/LemmyNet/lemmy https://github.com/LemmyNet/lemmy , Rust back-end, federated, in-development but usable) https://postmill.xyz https://postmill.xyz (source: https://gitlab.com/postmill/Postmill https://gitlab.com/postmill/Postmill, PHP back-end) There's also https://github.com/notabugio/notabug https://github.com/notabugio/notabug a P2P fork of old reddit UI (that used to be open source itself, old version: https://github.com/reddit-archive/reddit https://github.com/reddit-archive/reddit), and there's https://notabug.org/zPlus/freepost https://notabug.org/zPlus/freepost, I just found it searching for this stuff, those are the ones I know of.