RDoc.info is a service designed to generate and host documentation for Ruby libraries and Rails plugins hosted on GitHub, streamlining the process by updating API docs automatically with each code push through a post-commit hook. It operates under the GitHub user "docs" and publishes documentation directly to GitHub Pages, employing a familiar theme for consistency. This service is particularly beneficial for developers looking to enhance their projects' documentation accessibility and visibility on GitHub. The project is open for community contributions, with notable contributors like zapnap and jeffrafter, and was chronicled by Nick Quaranto.