An example `gulpfile.js` for CoffeeScript and Browserify. Note that this uses gulp-browserify's master. Update this as soon as 0.2.6 is out.

.gitignore

/node_modules
/build

app.coffee

App =
  start: ->
    console.log "app started!"

module.exports = App

gulpfile.js

var gulp = require('gulp');
var browserify = require('gulp-browserify');
var concat = require('gulp-concat');

gulp.task('scripts', function () {
  return gulp.src('./index.coffee', { read: false })
             .pipe(browserify({ transform: ['coffeeify'], extensions: ['.coffee'] }))
             .pipe(concat('index.js'))
             .pipe(gulp.dest('./build'));
});

gulp.task('default', function () {
  gulp.run('scripts');
});

index.coffee

App = require('./app')
App.start()

package.json

{
  "name": "gulp-coffee-browserify",
  "version": "0.0.0",
  "description": "Sample app for gulp, CoffeeScript and Browserify",
  "author": "Shuhei Kagawa <shuhei.kagawa@gmail.com>",
  "dependencies": {
    "gulp": "~3.3.1",
    "gulp-concat": "~2.1.7",
    "gulp-browserify": "https://github.com/deepak1556/gulp-browserify/tarball/master",
    "coffeeify": "~0.5.2"
  }
}

Right on!

Thanks :)