[tomashertus]

I use Github's Trends (https://github.com/trending) for discovery, and for all other searches, I use their search and tags. It never failed me to find what I was looking for. The star system already provides you with ratings for open-source projects, and Github's search has powerful filtering. I don't anticipate a general need for such a project.

If you are junior developer interested in learning development or a specific technology, it would be great project to build and open source though.