autoprefixer: parse CSS and add vendor prefixes to CSS rules via autoprefixer.

props: replace application properties in CSS files.

clean-css: minify css.

csslint: check and validate css rules.

less4j: Less support from less4j.

less: Less support from less.js.

sass: Sass support from Java Sass Compiler (libsass).

svg-sprites: Generates SVG and CSS sprites with PNG fallbacks via dr-svg-sprites.

svg-symbol: Generates SVG and CSS sprites using svg symbols.

yui-css: YUI CSS optimizer.

props: replace application properties in JavaScript files.

jscs: JavaScript code style checker.

jshint: JavaScript linter, helps to detect errors and potential problems in code..

babel: Ecma6 now via Babel.

rollup: rollup.js the next-generation ES6 module bundler.

ng-annotate: Add, remove and rebuild AngularJS dependency injection annotations.

closure-compiler: Google JavaScript optimizer and minifier.

uglify: uglify.js optimizer.

replace: replace strings in files while bundling them.

requirejs: r.js optimizer.

yui-js: YUI JS optimizer.