The whole ZenGL engine looks really interesting and promising.

I've just looked at the website and I actually didn't see a comprehensive "about" page. There was only a tiny page that summarized the core features/components of ZenGL. Might be something to add, perhaps?

Also, will ZenGL be opensourced eventually? (I didn't download it yet, but I have the impression that it's closed). And to what extend is 3D supported? I only saw a lot of 2D components/helpers.

Looking good so far. I will keep a close eye on this.