Don't know how many voxel fans there are here on polycount, but maybe there's a few within the low-poly fans. Really low on the radar as a start up company, Reality Foil is hosting a contest using their modeler. The prize is that they make and send the winning robots as 3d Prints, so pretty cute.
The modeler is browser based right now, free, and you just have to make a robot in it and post the png to their forum (then community vote after the contest ends). The voxel size is restricted to 16x16x32.
Links.....
The modeler -
http://www.vixle.com/
Their blog/website mentioning the contest -
http://www.realityfoil.com/blog/
Their Facebook -
https://www.facebook.com/RealityFoil
Replies
So the most-like robot is going to be 3d printed!
Voting happens by hearting the entry posts on their forums here:
http://forums.vixle.com/t/vixle-modeler-contest-robots/25/1