OctoLinker it a browser extension. Once installed, it allows you to navigate through projects on GitHub.com efficiently.

Most projects consist of many files and third party dependencies. Files are referencing other files and / or dependencies by language specific statements like include or require. Dependencies are most likely declared in a file called manifest e.g. package.json or Gemfile. The OctoLinker browser extension makes these references clickable. No more copy and search.