GitHub renders more than just code.
The following are supported:
- various image diff modes (side-by-side, swipe, blend)
*.stl3D models, incl. webGL acceleration & inline
*.tsvtables, incl. searching
*.topojsonmaps, incl. inline
- in my experience often need to refresh a few times to load properly)
*.mmdflowcharts, incl. inline