github-renderer
github-renderer is a utility that lets you view rendered HTML pages from github repositories on the fly.
Install
javascript:(function(){var d=document,s=d.createElement('script');s.src='//raw.github.com/ryt/github-renderer/master/render.js';d.body.appendChild(s);})();
Alternatively, if github allows you, you can drag [this] to your bookmarks bar.
Usage
These are HTML pages from various repos.
Browse them and click on the "github-renderer" bookmark to render them.
Note: make sure you allow pop-ups from *.github.com in your browser.
Note 2: This works best with Chrome or Safari. Firefox won't load js and css files for some of these links.