Summary: WebGL (Web Graphics Library) is a JavaScript API maintained by the Khronos group, a standards body responsible for other open standards including OpenGL. WebGL allows developers to display hardware-accelerated interactive 3D graphics in the browser without installing additional software -- READ: no plug-ins needed. It’s currently supported by most of the major browsers (Chrome, Safari, and Firefox). Though it’s not clear when or if Microsoft will support WebGL, the applications created with WebGL are impressive. Ellie Goulding's Lights illustrates its power.
