Here: Fractal Lab
Looks like in-browser Corona for fractals with all the cool features like interactive rendering and volumetrics. Unfortunately it’s not publicly available yet.
Also comment from one of forums: “I don’t know what’s better - the software or author’s voice”. 
edit: looks like some older version is available Fractal Lab - Interactive WebGL Fractal Explorer
Usually I avoid the word “fractals”, but this time I just suspended judgement and took a tour… incredible one indeed! Was mesmerized for a while, and this yes in some regards it seems to use a similar type of rendering engine as Corona