Awesome
gulp-smushit 
Gulp plugin to optimize PNG and JPG using reSmush.it. Made on top of smosh.
reSmush.it is a FREE alternative to Yahoo Smush.it (deprecated on March 2015). This tool provides a online way to optimize pictures size via a documented webservice.
Prefer Grunt? grunt-smushit
Install
$ npm install --save-dev gulp-smushit
Usage
var gulp = require('gulp');
var smushit = require('gulp-smushit');
gulp.task('default', function () {
return gulp.src('src/**/*.{jpg,png}')
.pipe(smushit())
.pipe(gulp.dest('dist'));
});
API
smushit(options)
options
verbose
Type: boolean
Default: false
Show compress rate stats
License
MIT © Helder Santana