I've had some time to play with Structure Synth and after some experimenting I came up with the results below. The black and white renders are all different, random variations of the same code, I named it "Quantom stories" and I'll release it, but it needs some work, to produce more various results.
Besides Context free, my other favorite toy is Structure Synth. It also uses a very similar code grammar like Contect free, but you are able to manipulate things on the Z axis.
Here are some of my first experimental images that I magaged to render.
This image is generated with the amazing CFDG software. If you are not familiar with it, then check out their gallery to see what is it capable of.
What I like about this program is that you can create very complex structures with a few lines code.