What are some fediverse apps that need contributors?

I'm a decent developer, but with only a couple years' professional experience and no formal training. I'm looking for open source projects to contribute to (ideally pick one or two and get dedicated to them).

I'm open to small or large projects.

I'm using this as my source of options:

https://fediverse.party/en/miscellaneous/

But I'm curious if there are other ones, or if you all have ideas about which ones are needing and deserving help.

Thanks!