dotjs is a Google Chrome extension that executes JavaScript files in ~/.js based on their filename. If you navigate to http://www.google.com/, dotjs will execute ~/.js/google.com.js. This makes it super easy to spruce up your favorite pages using JavaScript. On subdomains such as http://gist.github.com dotjs will try to load ~/.js/gist.github.com.js as well as ~/.js/github.com.js and ~/.js/com.js.