parallax.js
Parallax Engine that reacts to the orientation of a smart device
...If you don't have a smart device, no worries, if no gyroscope or motion detection hardware is available, parallax.js uses the position of your cursor instead. Most configuration settings can be declared either as data-value attribute of the scene element, or property of the configuration object. The programmatic approach will take priority over the data-value attributes set in the HTML. Some options can also be set at run-time via instance methods. Parallax will only be in effect while the cursor is over the scene element, otherwise all layers move back to their initial position.