I have looked for something similar. There are a number of spaces where FOSS project lists are maintained, but they are often focused on a singular topics like 'privacy' or something akin, and they aren't often parts of larger lists that can be sorted based on the conditions you mentioned above.
The closest thing, if you are interested in other possible tools that might help: Alternative.to, a crowdsourced software searching tool, which has a means of filtering to show only, say, open source projects, or sort by tags that denote stacks used, languages used, etc. (see screenshot of tags I added). It has been useful enough for my own needs when looking for what you've been looking for.
Either way, best of luck! I haven't been able to find something yet, myself.
If you're an Android user: scroll through F-Droid, download interesting apps, and then hunt for problems or try to come up with interesting, helpful features. For example, I could really use a live stopwatch widget in: https://f-droid.org/packages/com.best.deskclock/
Google Clock has it, but this app doesn't for some reason.
Whoa, yeah, F-Droid is perhaps the biggest FOSS Android app market, an alternative to the Play Store. I suggest navigating through it using Droid-ify. Enable visibility of all repositories in the top-right corner to be able to see more apps. Even Bitwarden has an official presence in F-Droid to accommodate Play Store avoiders, etc.