http://merk.gumroad.com/l/symex
Symex is an object generator plugin that replicates your objects geometry symmetrically in Cinema 4D. It works like a fractal that repeats itself while adding some randomization on top of the mesh to keep things interesting. You can quickly create very detailed structures out of almost nothing. Combine this with some of Merk’s other plugins such as Topowire for even more crazy effects!