Qubicle Constructor, pls.
As the title implies, I saw some random guy in a random forum in a dark, faraway random place in the Innernettes, talking about voxels and stuff. Naturally I wanted to learn how to do that stuff myself (because I was curious and bored and piss and stuff) so I downloaded what I thought was best for learning how to do that and... this happened. The Nod Raider from TW.
Whatever, those were some really fun five days of OCDing hard. Please blame my Aspergers.