DAT.GUI is a lightweight controller library for JavaScript. It allows you to easily manipulate variables and fire functions on the fly. DAT.GUI will infer the type of the property you’re trying to add (based on its initial value) and create the corresponding control.

By default, DAT.GUI panels will be automatically added to the HTML document and fixed to the top of the screen from right to left. You can disable this behavior and append the gui DOM element to a container of your choosing.

Requirements: Javascript enabled
Demo: http://dataarts.github.com/dat.gui/
License: License Free