https://github.com/blog/1547-release-your-software
Check out the list of D3 releases https://github.com/mbostock/d3/releases/
> You can also attach binary assets (such as compiled executables, minified scripts, documentation) to a release.
Nice. I knew they didn't turn Downloads off for good (API still works, or at least worked some time ago), but I didn't expect such move.