It's really nice just to have a browse through the apps, actually. I've learned about some cool projects which I never knew existed!

That's what I think every time when I find a new project! There are a few directories, but none perfect. I'd like to see one that's user-updatable (via Github), sort- and filterable and shows the current health of a project (last update, contributors, ..). Closest I found is this:

https://github.com/awesome-selfhosted/awesome-selfhosted