I recently stumbled upon https://www.hackdex.app/ which is a lovely website dedicated to Pokémon ROM hacks.

It's a really vibrant scene, with a lot of different hacks that go all the way to fully-fledged games, but because it's so rich it can be a pain to find what is available and what the latest version of a given ROM hack is.

This website has a neat feature where you upload any base Pokémon ROM file, and it filters all available ROM hacks that are compatible with it via a neat UI. And of course it offers you a one-click download (well, in-local-storage-patch) to the given ROM hack.

Source code: https://github.com/Hackdex-App/hackdex-website