Nice work releasing your FE environment setup; couple of questions: "The most used preprocessor with a kick-ass mixin library" Is this true? I haven't looked for actual numbers, but most FE devs I talk to use sass. We use node-sass + autoprefixer and it compiles orders of magnitude faster than compass+sass and means you don't have a dependency on ruby (or php like Less). Also, gulp is much faster than grunt which is especially noticeable on large projects.