Favorites:
http://corte.si/ http://cr.yp.to/ http://www.gwern.net/ http://worrydream.com/ http://fooledbyrandomness.com/ http://lambda-the-ultimate.org/
Fwiw the associate here is Sahil Lavingia, founder of Gumroad and a longtime HN'er:
https://news.ycombinator.com/user?id=sahillavingia
He posted about his experience here:
It wasn't really a "fork" though, was it? Rather a from-scratch re-implementation of the Nix/NixOS concepts using Guile Scheme in place of the Nix config language.
Or just use Obsidian's built-in E2E encrypted syncing.
But yeah, since it stores everything as flat markdown files, you can sync or archive your Obsidian docs folder with anything.
This project is an enhanced reader for Ycombinator Hacker News: https://news.ycombinator.com/.
The interface also allow to comment, post and interact with the original HN platform. Credentials are stored locally and are never sent to any server, you can check the source code here: https://github.com/GabrielePicco/hacker-news-rich.
For suggestions and features requests you can write me here: gabrielepicco.github.io