Aurora
Aurora is an HTML5, Sass and Compass powered minimalist base theme. It is optimized for both responsive and mobile first web design. Built to encourage best modern front end practices, Aurora comes with, LiveReload, Google Chrome Frame, and Typekit integrations, with advanced integrations with Bower for package management and Gulp for task management (Sass compiling, JS Hinting, Image Optimization, and app-free Live Reloading out of the box) available. It also suggests and recommends Drupal modules to get the most out of both Aurora and out of Drupal. All of the optimizations and integrations in Aurora are designed to be there only when you need them and get out of your way when you don't.