It's nothing new that Github could render geojson files in our repository. So, I was thinking to make some maps in json files on Github, use iframe, and show just the map part from that page.
But Github doesn't just stop there to please developers. They make many stuffs embeddable. I don't want to explain how to do that, you can just read it here. No, it's not only map that you can embed in your website, 3D files too! Probably there are other stuffs too that we can embed from github :)
Here is the example, a map of QGIS Contributors from the JSON files in its repository.