diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
index e6143b17b7..4e33871c48 100644
--- a/CONTRIBUTORS.md
+++ b/CONTRIBUTORS.md
@@ -118,6 +118,7 @@ All definitions files include a header with the author and editors, so at some p
 * [Google Page Speed Online API](https://developers.google.com/speed/pagespeed/) (by [Frank M](https://github.com/sgtfrankieboy))
 * [Google Translate API](https://developers.google.com/translate/) (by [Frank M](https://github.com/sgtfrankieboy))
 * [Google Url Shortener](https://developers.google.com/url-shortener/) (by [Frank M](https://github.com/sgtfrankieboy))
+* [gulp](http://gulpjs.com/) (by [Drew Noakes](https://drewnoakes.com))
 * [Hammer.js](http://eightmedia.github.com/hammer.js/) (by [Boris Yankov](https://github.com/borisyankov))
 * [Hapi](http://github.com/spumko/hapi) (by [Hakubo](http://github.com/hakubo))
 * [Handlebars](http://handlebarsjs.com/) (by [Boris Yankov](https://github.com/borisyankov))
diff --git a/gulp/gulp-tests.ts b/gulp/gulp-tests.ts
new file mode 100644
index 0000000000..50ebeebf06
--- /dev/null
+++ b/gulp/gulp-tests.ts
@@ -0,0 +1,21 @@
+/// <reference path="gulp.d.ts" />
+
+import gulp = require("gulp");
+
+var typescript: any = null; // this would be the TypeScript compiler
+var jasmine: any = null; // this would be the jasmine test runner
+
+gulp.task('compile', function()
+{
+    gulp.src("**/*.ts")
+        .pipe(typescript)
+        .dest('out')
+});
+
+gulp.task('test', ['compile'], function()
+{
+    gulp.src("out/test/**/*.js")
+        .pipe(jasmine);
+});
+
+gulp.task('default', ['compile', 'test']);
diff --git a/gulp/gulp.d.ts b/gulp/gulp.d.ts
new file mode 100644
index 0000000000..908fc4c270
--- /dev/null
+++ b/gulp/gulp.d.ts
@@ -0,0 +1,286 @@
+// Type definitions for Gulp v3.8.x
+// Project: http://gulpjs.com
+// Definitions by: Drew Noakes <https://drewnoakes.com>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+declare module gulp {
+
+    /**
+     * Options to pass to node-glob through glob-stream.
+     * Specifies two options in addition to those used by node-glob:
+     * https://github.com/isaacs/node-glob#options
+     */
+    interface ISrcOptions {
+        /**
+         * Setting this to <code>false</code> will return <code>file.contents</code> as <code>null</code>
+         * and not read the file at all.
+         * Default: <code>true</code>.
+         */
+        read?: boolean;
+
+        /**
+         * Setting this to false will return <code>file.contents</code> as a stream and not buffer files.
+         * This is useful when working with large files.
+         * Note: Plugins might not implement support for streams.
+         * Default: <code>true</code>.
+         */
+        buffer?: boolean;
+
+        /**
+         * The current working directory in which to search.
+         * Defaults to process.cwd().
+         */
+        cwd?: string;
+
+        /**
+         * The place where patterns starting with / will be mounted onto.
+         * Defaults to path.resolve(options.cwd, "/") (/ on Unix systems, and C:\ or some such on Windows.)
+         */
+        root?: string;
+
+        /**
+         * Include .dot files in normal matches and globstar matches.
+         * Note that an explicit dot in a portion of the pattern will always match dot files.
+         */
+        dot?: boolean;
+
+        /**
+         * By default, a pattern starting with a forward-slash will be "mounted" onto the root setting, so that a valid
+         * filesystem path is returned. Set this flag to disable that behavior.
+         */
+        nomount?: boolean;
+
+        /**
+         * Add a / character to directory matches. Note that this requires additional stat calls.
+         */
+        mark?: boolean;
+
+        /**
+         * Don't sort the results.
+         */
+        nosort?: boolean;
+
+        /**
+         * Set to true to stat all results. This reduces performance somewhat, and is completely unnecessary, unless
+         * readdir is presumed to be an untrustworthy indicator of file existence. It will cause ELOOP to be triggered one
+         * level sooner in the case of cyclical symbolic links.
+         */
+        stat?: boolean;
+
+        /**
+         * When an unusual error is encountered when attempting to read a directory, a warning will be printed to stderr.
+         * Set the silent option to true to suppress these warnings.
+         */
+        silent?: boolean;
+
+        /**
+         * When an unusual error is encountered when attempting to read a directory, the process will just continue on in
+         * search of other matches. Set the strict option to raise an error in these cases.
+         */
+        strict?: boolean;
+
+        /**
+         * See cache property above. Pass in a previously generated cache object to save some fs calls.
+         */
+        cache?: boolean;
+
+        /**
+         * A cache of results of filesystem information, to prevent unnecessary stat calls.
+         * While it should not normally be necessary to set this, you may pass the statCache from one glob() call to the
+         * options object of another, if you know that the filesystem will not change between calls.
+         */
+        statCache?: boolean;
+
+        /**
+         * Perform a synchronous glob search.
+         */
+        sync?: boolean;
+
+        /**
+         * In some cases, brace-expanded patterns can result in the same file showing up multiple times in the result set.
+         * By default, this implementation prevents duplicates in the result set. Set this flag to disable that behavior.
+         */
+        nounique?: boolean;
+
+        /**
+         * Set to never return an empty set, instead returning a set containing the pattern itself.
+         * This is the default in glob(3).
+         */
+        nonull?: boolean;
+
+        /**
+         * Perform a case-insensitive match. Note that case-insensitive filesystems will sometimes result in glob returning
+         * results that are case-insensitively matched anyway, since readdir and stat will not raise an error.
+         */
+        nocase?: boolean;
+
+        /**
+         * Set to enable debug logging in minimatch and glob.
+         */
+        debug?: boolean;
+
+        /**
+         * Set to enable debug logging in glob, but not minimatch.
+         */
+        globDebug?: boolean;
+    }
+
+    interface IDestOptions {
+        /**
+         * The output folder. Only has an effect if provided output folder is relative.
+         * Default: process.cwd()
+         */
+        cwd?: string;
+
+        /**
+         * Octal permission string specifying mode for any folders that need to be created for output folder.
+         * Default: 0777.
+         */
+        mode?: string;
+    }
+
+    /**
+     * Options that are passed to <code>gaze</code>.
+     * https://github.com/shama/gaze
+     */
+    interface IWatchOptions {
+        /** Interval to pass to fs.watchFile. */
+        interval?: number;
+        /** Delay for events called in succession for the same file/event. */
+        debounceDelay?: number;
+        /** Force the watch mode. Either 'auto' (default), 'watch' (force native events), or 'poll' (force stat polling). */
+        mode?: string;
+        /** The current working directory to base file patterns from. Default is process.cwd().. */
+        cwd?: string;
+    }
+
+    interface IWatchEvent {
+        /** The type of change that occurred, either added, changed or deleted. */
+        type: string;
+        /** The path to the file that triggered the event. */
+        path: string;
+    }
+
+    /**
+     * Callback to be called on each watched file change.
+     */
+    interface IWatchCallback {
+        (event:IWatchEvent): void;
+    }
+
+    interface ITaskCallback {
+        /**
+         * Defines a task.
+         * Tasks may be made asynchronous if they return a promise or a stream.
+         */
+        (): any;
+
+        /**
+         * Defines an asynchronous task.
+         * @param cb callback used to signal asynchronous completion. Caller includes <code>err</code> in case of error.
+         */
+        (cb:(err?:any)=>void): void;
+    }
+
+    interface EventEmitter {
+        any: any;
+    }
+
+    interface Gulp {
+        /**
+         * Define a task.
+         *
+         * @param name the name of the task. Tasks that you want to run from the command line should not have spaces in them.
+         * @param fn the function that performs the task's operations. Generally this takes the form of gulp.src().pipe(someplugin()).
+         */
+        task(name:string, fn:ITaskCallback): Gulp;
+
+        /**
+         * Define a task.
+         *
+         * @param name the name of the task. Tasks that you want to run from the command line should not have spaces in them.
+         * @param dep an array of tasks to be executed and completed before your task will run.
+         * @param fn the function that performs the task's operations. Generally this takes the form of gulp.src().pipe(someplugin()).
+         */
+        task(name:string, dep:string[], fn?:ITaskCallback): Gulp;
+
+
+        /**
+         * Takes a glob and represents a file structure. Can be piped to plugins.
+         * @param glob a glob string, using node-glob syntax
+         * @param opt an optional option object
+         */
+        src(glob:string, opt?:ISrcOptions): Gulp;
+
+        /**
+         * Takes a glob and represents a file structure. Can be piped to plugins.
+         * @param glob an array of glob strings, using node-glob syntax
+         * @param opt an optional option object
+         */
+        src(glob:string[], opt?:ISrcOptions): Gulp;
+
+
+        /**
+         * Can be piped to and it will write files. Re-emits all data passed to it so you can pipe to multiple folders.
+         * Folders that don't exist will be created.
+         *
+         * @param outFolder the path (output folder) to write files to.
+         * @param opt
+         */
+        dest(outFolder:string, opt?:IDestOptions): Gulp;
+
+        /**
+         * Can be piped to and it will write files. Re-emits all data passed to it so you can pipe to multiple folders.
+         * Folders that don't exist will be created.
+         *
+         * @param outFolder a function that converts a vinyl File instance into an output path
+         * @param opt
+         */
+        dest(outFolder:(file:string)=>string, opt?:IDestOptions): Gulp;
+
+
+        /**
+         * Forwards the current Gulp instance, along with its contained files, to the specified receiver.
+         *
+         * @param receiver the receiver
+         */
+        pipe(receiver:any): Gulp;
+
+
+        /**
+         * Watch files and do something when a file changes. This always returns an EventEmitter that emits change events.
+         *
+         * @param glob a single glob or array of globs that indicate which files to watch for changes.
+         * @param opt options, that are passed to the gaze library.
+         * @param tasks names of task(s) to run when a file changes, added with gulp.task()
+         */
+        watch(glob:string, opt:IWatchOptions, tasks:string[]): EventEmitter;
+        watch(glob:string[], opt:IWatchOptions, tasks:string[]): EventEmitter;
+
+        /**
+         * Watch files and do something when a file changes. This always returns an EventEmitter that emits change events.
+         *
+         * @param glob a single glob or array of globs that indicate which files to watch for changes.
+         * @param fn a callback or array of callbacks to be called on each change.
+         */
+        watch(glob:string, fn:IWatchCallback): EventEmitter;
+        watch(glob:string[], fn:IWatchCallback): EventEmitter;
+        watch(glob:string, fn:IWatchCallback[]): EventEmitter;
+        watch(glob:string[], fn:IWatchCallback[]): EventEmitter;
+
+        /**
+         * Watch files and do something when a file changes. This always returns an EventEmitter that emits change events.
+         *
+         * @param glob a single glob or array of globs that indicate which files to watch for changes.
+         * @param opt options, that are passed to the gaze library.
+         * @param fn a callback or array of callbacks to be called on each change.
+         */
+        watch(glob:string, opt:IWatchOptions, fn:IWatchCallback): EventEmitter;
+        watch(glob:string, opt:IWatchOptions, fn:IWatchCallback[]): EventEmitter;
+    }
+}
+
+declare module "gulp" {
+    var _tmp:gulp.Gulp;
+    export = _tmp;
+}