diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
index df1493d8c2..2167aaf408 100644
--- a/CONTRIBUTORS.md
+++ b/CONTRIBUTORS.md
@@ -144,6 +144,7 @@ All definitions files include a header with the author and editors, so at some p
 * [i18n-node](https://github.com/mashpie/i18n-node) (by [Maxime LUCE](https://github.com/SomaticIT))
 * [iCheck](http://damirfoy.com/iCheck/) (by [Dániel Tar](https://github.com/qcz))
 * [Impress.js](https://github.com/bartaz/impress.js) (by [Boris Yankov](https://github.com/borisyankov))
+* [Intercom.js](https://github.com/diy/intercom.js) (by [Spencer Williams](https://github.com/spencerwi))
 * [Imagemagick](http://github.com/rsms/node-imagemagick) (by [Carlos Ballesteros Velasco](https://github.com/soywiz))
 * [inflection](https://github.com/dreamerslab/node.inflection) (by [Shogo Iwano](https://github.com/shiwano))
 * [insight](https://github.com/yeoman/insight) (by [vvakame](https://github.com/vvakame))
diff --git a/intercomjs/intercom-tests.ts b/intercomjs/intercom-tests.ts
new file mode 100644
index 0000000000..be25ba7dbc
--- /dev/null
+++ b/intercomjs/intercom-tests.ts
@@ -0,0 +1,20 @@
+/// <reference path="intercom.d.ts" />
+
+function test_intercom_static() {
+    var instance: intercom.Intercom = Intercom.getInstance();
+
+    var capturedMessage: any;
+    var detect: Function = (msg: any) => capturedMessage = msg;
+    instance.on("test", detect);
+
+    var msgToSend: any = {one: 1, two: "2"};
+    instance.emit("test", msgToSend);
+    console.log(capturedMessage === msgToSend);
+
+    var onceListenerInvokedTimes = 0;
+    instance.once("testOnce", ()=>onceListenerInvokedTimes+=1, 300);
+    instance.once("testOnce", ()=>onceListenerInvokedTimes+=1, 300);
+    console.log(onceListenerInvokedTimes === 1);
+
+    instance.emit("eventWithoutAMessage");
+}
diff --git a/intercomjs/intercom.d.ts b/intercomjs/intercom.d.ts
new file mode 100644
index 0000000000..c149c827da
--- /dev/null
+++ b/intercomjs/intercom.d.ts
@@ -0,0 +1,52 @@
+// Type definitions for intercom.js
+// Project: https://github.com/diy/intercom.js
+// Definitions by: spencerwi <http://github.com/spencerwi>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+declare module intercom {
+    interface Intercom {
+        /**
+          * Broadcasts a message to all open windows (including the current window).
+          * @param name The string event name
+          * @param message The event data/message
+          */
+        emit(name: string, message?: any): void;
+        /**
+          * Sets up a listener to be invoked when a message with the given name is received.
+          * @param name The string event name to listen for.
+          * @param fn The listener method to invoke.
+          */
+        on(name: string, fn: Function): void;
+        /**
+          * Given a unique key to represent the function, fn will be invoked in only one window. The ttl argument represents the number of seconds before the function can be called again.
+          * @param key The unique function identifier key
+          * @param fn The function to be called once
+          * @param ttl The amount of time in seconds to wait before allowing the function to be invoked again.
+          */
+        once(key: string, fn: Function, ttl?: number): void;
+        /**
+          * Bind to a socket.io socket and forward all received messages to all windows and/or back to the socket.
+          * @param socket A socket.io socket to bind to.
+          * @param options Object with "send" and "receive" keys having values of Boolean or Boolean-producing function to determine whether message(s) should be forwarded to/from the socket.
+          */
+        bind(socket: any, options?: intercom.SocketBindingOptions): void;
+    }
+    interface SocketBindingOptions {
+        send?: any; /* boolean | (name: string, message: any)=>any */
+        receive?: any; /* boolean | (name: string, message: any)=>any */
+    }
+}
+
+interface IntercomStatic {
+    /**
+      * Returns an instance of Intercom. If one doesn't exist, it will be instantiated.
+      * @return an instance of Intercom.
+      */
+    getInstance(): intercom.Intercom;
+    /**
+      * Removes all data associated with intercom from localStorage.
+      */
+    destroy(): void;
+}
+
+declare var Intercom: IntercomStatic