It never stops amazing me how many little interesting projects are out there to play with and have fun.
One of them is Structure Synth — a tool that allows creating interesting 3D structured objects from a set of rules. Mikael Hvidtfeldt Christensen, its developer, says it is an attempt to create a 3D version of Context Free.
The picture above is taken from a dedicated Flickr group 
P.S. And Merry Christmas, everyone 