diff --git a/README.md b/README.md
index 0c0a629192..98f6ccdc44 100755
--- a/README.md
+++ b/README.md
@@ -92,6 +92,7 @@ List of Definitions
 * [jake](https://github.com/mde/jake) (by [Kon](http://phyzkit.net/))
 * [Jasmine](http://pivotal.github.com/jasmine/) (by [Boris Yankov](https://github.com/borisyankov))
 * [Jasmine-jQuery](https://github.com/velesin/jasmine-jquery) (by [Gregor Stamac](https://github.com/gstamac))
+* [JointJS](http://www.jointjs.com/) (by [Aidan Reel](http://github.com/areel))
 * [jQRangeSlider](http://ghusse.github.com/jQRangeSlider) (by [Dániel Tar](https://github.com/qcz))
 * [jQuery](http://jquery.com/) (from TypeScript samples)
 * [jQuery Mobile](http://jquerymobile.com) (by [Boris Yankov](https://github.com/borisyankov))
diff --git a/jointjs/README.md b/jointjs/README.md
new file mode 100644
index 0000000000..5ea728842f
--- /dev/null
+++ b/jointjs/README.md
@@ -0,0 +1,9 @@
+# JointJS Definitions Usage Notes
+
+TypeScript definitions for the JointJS framework available at http://www.jointjs.com
+
+Current version 0.6
+
+## Referencing JointJS definition files in your code
+
+Add `/// <reference path="jointjs.d.ts" />` at the top of your code.
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diff --git a/jointjs/jointjs.d.ts b/jointjs/jointjs.d.ts
new file mode 100644
index 0000000000..d3e6a204ea
--- /dev/null
+++ b/jointjs/jointjs.d.ts
@@ -0,0 +1,115 @@
+// Type definitions for Joint JS 0.6
+// Project: http://www.jointjs.com/
+// Definitions by: Aidan Reel <http://github.com/areel> with help from David Durman <http://github.com/DavidDurman>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+/// <reference path="../backbone/backbone.d.ts" />
+
+
+declare module joint {
+
+    module dia {
+
+        interface IElementSize {
+            width: number;
+            height: number;
+        }
+
+        class Graph extends Backbone.Model {
+            initialize();
+            fromJSON(json: any);
+            clear();
+            addCell(cell: Cell);
+            addCells(cells: Cell[]);
+            getConnectedLinks(cell: Cell, opt?: any): Link[];
+            disconnectLinks(cell: Cell);
+            removeLinks(cell: Cell);
+        }
+
+        class Cell extends Backbone.Model {
+            toJSON();
+            remove(options?: any);
+            toFront();
+            toBack();
+            embed(cell: Cell);
+            unembed(cell: Cell);
+            getEmbeddedCells(): Cell[];
+            clone<T>(opt?: any): T;      // @todo: return can either be Cell or Cell[].
+            attr(attrs: any): Cell;
+        }
+
+
+
+        class Element extends Cell {
+            position(x: number, y: number): Element;
+            translate(tx: number, ty?: number): Element;
+            resize(width: number, height: number): Element;
+            rotate(angle: number, absolute): Element;
+        }
+        interface IDefaults {
+            type: string;
+        }
+
+        class Link extends Cell {
+            defaults: IDefaults;
+            disconnect(): Link;
+            label(idx?: number, value?: any): any;   // @todo: returns either a label under idx or Link if both idx and value were passed
+        }
+
+        interface IOptions {
+            width: number;
+            height: number;
+            gridSize: number;
+            perpendicularLinks: boolean;
+            elementView: ElementView;
+            linkView: LinkView;
+        }
+
+        class Paper extends Backbone.View {
+            options: IOptions;
+            setDimensions(width: number, height: number);
+            scale(sx: number, sy?: number, ox?: number, oy?: number): Paper;
+            rotate(deg: number, ox?: number, oy?: number): Paper;      // @todo not released yet though it's in the source code already
+            findView(el: any): CellView;
+            findViewByModel(modelOrId: any): CellView;
+            findViewsFromPoint(p: { x: number; y: number; }): CellView[];
+            findViewsInArea(r: { x: number; y: number; width: number; height: number; }): CellView[];
+            snapToGrid(p): { x: number; y: number; };
+        }
+
+        class ElementView {
+            scale(sx: number, sy: number);
+        }
+        class CellView extends Backbone.View {
+            getBBox(): { x: number; y: number; width: number; height: number; };
+            highlight(el?: any);
+            unhighlight(el?: any);
+            findMagnet(el: any);
+            getSelector(el: any);
+        }
+
+        class LinkView extends CellView {
+            getConnectionLength(): number;
+            getPointAtLength(length: number): { x: number; y: number; };
+        }
+    
+    }
+    module ui { }
+    module shapes {
+        module basic {
+            class Generic extends joint.dia.Element { }
+            class Rect extends Generic { }
+            class Text extends Generic { }
+            class Circle extends Generic { }
+            class Image extends Generic { }
+        }
+    }
+    module util {
+        function uuid(): string;
+        function guid(obj: any): string;
+        function mixin(objects: any[]): any;
+        function supplement(objects: any[]): any;
+        function deepMixin(objects: any[]): any;
+        function deepSupplement(objects: any[]): any;
+    }
+}
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