This is really cool, and props for making it at least dynamic-ish by rendering JSON data with D3.

That said, some of the clustering (or at least the clustering visualization) seems strange, such as AngularJS within jQuery, PouchDB within React, EmberJS within Rails, redis-doc being included within Go, oh-my-zsh within homebrew, etc.

FWIW, there's also a bit more info available here: https://github.com/oracleofnj/gitmap