You can navigate and track changes in the code in your files.
You can understand the relationships within and across repositories by navigating code directly in GitHub.
You can view raw file content or trace changes to lines in a file and discover how parts of the file evolved over time.
When viewing a file on GitHub.com, you can press the "y" key to update the URL to a permalink to the exact version of the file you see.
You can download a snapshot of the code in your repository.
GitHub supports rendering and diffing in a number of non-code file formats.