GitHub Next | Visualizing a Codebase
Imagine this: you're looking at a new codebase, and you want to find the code for a specific function. For example, in the create-react-app codebase, How quickly can you find a test for react-dev-utils? facebook/create-react-app That wasn't terribly difficult, but it also probably took a bit of time and exploration.
https://githubnext.com/projects/repo-visualization/