It is a nice looking tool with an API to minify your js code.
A simple tool for minifying CSS/JS without a big setup. It reworks URLs in CSS from the original location to the output location. It automatically resolves @import statements in CSS.
Gulp.js is the streaming build system. It's use of streams and code-over-configuration makes for a simpler and more intuitive build. By preferring code over configuration, gulp keeps simple things simple and makes complex tasks manageable. By harnassing the power of node's streams you get fast builds that don't write intermediary files to disk. Gulp's strict plugin guidelines assure plugins stay simple and work the way you expect.
Koala is a GUI application for Less, Sass, Compass and CoffeeScript compilation, to help web developers to use them more efficiently. Koala can run in windows, linux and mac.
Prepros is a tool to compile LESS, Sass, Compass, Stylus, Jade and much more with automatic CSS prefixing, It comes with built in server for cross browser testing. It runs on windows, mac and linux.
10. Ajax Minifier
12. Ultra Minifier
13. Require JS