diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
index a3f729ca9..74c0363b0 100644
--- a/CONTRIBUTORS.md
+++ b/CONTRIBUTORS.md
@@ -58,6 +58,7 @@ All definitions files include a header with the author and editors, so at some p
 * [dust](http://linkedin.github.com/dustjs) (by [Marcelo Dezem](https://github.com/mdezem))
 * [EaselJS](http://www.createjs.com/#!/EaselJS) (by [Pedro Ferreira](https://bitbucket.org/drk4))
 * [EasyStar](http://easystarjs.com/) (by [Magnus Gustafsson](https://github.com/Borundin))
+* [Elm](http://elm-lang.org) (by [Dénes Harmath](https://github.com/thSoft))
 * [ember.js](http://emberjs.com/) (by [Boris Yankov](https://github.com/borisyankov))
 * [emissary](https://github.com/atom/emissary) (by [vvakame](https://github.com/vvakame))
 * [EpicEditor](http://epiceditor.com/) (by [Boris Yankov](https://github.com/borisyankov))
diff --git a/elm/elm-tests.ts b/elm/elm-tests.ts
new file mode 100644
index 000000000..dd0c60197
--- /dev/null
+++ b/elm/elm-tests.ts
@@ -0,0 +1,42 @@
+/// <reference path="elm.d.ts" />
+
+// Based on https://gist.github.com/evancz/8521339
+
+interface Elm {
+	Shanghai: ElmModule<ShanghaiPorts>;
+}
+
+interface ShanghaiPorts {
+	coordinates: PortToElm<Array<number>>;
+	incomingShip: PortToElm<Ship>;
+	outgoingShip: PortToElm<string>;
+	totalCapacity: PortFromElm<number>;
+}
+
+interface Ship {
+	name: string;
+	capacity: number;
+}
+
+// initialize the Shanghai component which keeps track of
+// shipping data in and out of the Port of Shanghai.
+var shanghai = Elm.worker(Elm.Shanghai, {
+	coordinates: [0, 0],
+	incomingShip: { name: "", capacity: 0 },
+	outgoingShip: ""
+});
+
+function logger(x: any) { console.log(x) }
+shanghai.ports.totalCapacity.subscribe(logger);
+// send some ships to the port of Shanghai
+shanghai.ports.incomingShip.send({
+	name: "Mary Mærsk",
+	capacity: 18270
+});
+shanghai.ports.incomingShip.send({
+	name: "Emma Mærsk",
+	capacity: 15500
+});
+// have those ships leave the port of Shanghai
+shanghai.ports.outgoingShip.send("Mary Mærsk");
+shanghai.ports.outgoingShip.send("Emma Mærsk");
\ No newline at end of file
diff --git a/elm/elm.d.ts b/elm/elm.d.ts
new file mode 100644
index 000000000..1185394be
--- /dev/null
+++ b/elm/elm.d.ts
@@ -0,0 +1,28 @@
+// Type definitions for Elm 0.12
+// Project: http://elm-lang.org
+// Definitions by: Dénes Harmath <https://github.com/thSoft>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+declare var Elm: Elm;
+
+interface Elm {
+	embed<P>(elmModule: ElmModule<P>, element: Node, initialValues?: Object): ElmComponent<P>;
+	fullscreen<P>(elmModule: ElmModule<P>, initialValues?: Object): ElmComponent<P>;
+	worker<P>(elmModule: ElmModule<P>, initialValues?: Object): ElmComponent<P>;
+}
+
+interface ElmModule<P> {
+}
+
+interface ElmComponent<P> {
+	ports: P;
+}
+
+interface PortToElm<V> {
+	send(value: V): void;
+}
+
+interface PortFromElm<V> {
+	subscribe(handler: (value: V) => void): void;
+	unsubscribe(handler: (value: V) => void): void;
+}
\ No newline at end of file