This is a Maya tool I wrote in MEL script for generating a wide range of procedurally generated structures to be used for environment backgrounds or anywhere that many low-poly buildings would be needed.
It generates 5 different types of structures, all with a wide range of random variables. In the screenshot to the left you can see the variance created with just the 5 options. The green and the orange buildings in the bottom left corner of the screenshot are both generated from the same structure, for instance.