A lot of the best open-source projects/programming languages have an awesome repository on GitHub. I’ve started working on one for Babylon.js:
It’s a collection of all the best resources related to Babylon.js, including documentation, articles, and projects. I’m just getting started, so if you have something you’d like to see added, feel free to submit a pull request. Just read the contributing guidelines.
You can add any project you want, as long as it’s both useful and open-source. There’s already a list of the best games made with Babylon on the main website. This is intended to be more useful for developers.