Gulp with Livereload for Magento2, the only reason i wanted to use this is due to the speed of the current grunt way, i actually still use grunt for several tasks, but just the watching and generating of css files i think Gulp is the way to go. only downside is that you need to add your less files by hand. http://www.microdesign.nl

gulpfile.js

// Gulpfile for Magento 2 with livereload
// Author: Kay in 't Veen - Microdesign.nl
// 
// 
// Load gulp and plug-ins
var gulp 	= require('gulp'),
jshint 		= require('gulp-jshint'),
less 		= require('gulp-less'),
concat 		= require('gulp-concat'),
uglify 		= require('gulp-uglify'),
rename 		= require('gulp-rename'),
gutil 		= require('gulp-util'),
livereload  = require('gulp-livereload'),
sourcemaps 	= require('gulp-sourcemaps');


// Generate less to CSS.
gulp.task('less', function() {
    return gulp.src([	'app/design/frontend/<vendor>/<theme>/web/css/<filename>.less',
    					'app/design/frontend/<vendor>/<theme>/web/css/<filename2>.less'])
        .pipe(less())
        .pipe( sourcemaps.write() )
        .pipe( livereload() )
        .pipe(gulp.dest('pub/static/frontend/<vendor>/<theme>/nl_NL/css'));
        
});

// Watch Files For Changes and livereload
gulp.task('watch', function() {
	livereload.listen();
    gulp.watch('app/design/frontend/<vendor>/<theme>/web/**/*.less', ['less']);
});


gulp.task('default', ['less', 'watch']);

One problem with using Gulp in Magento 2 to compile is the fallback system. Any idea how to include files like /source/lib/_variables.less?