This is a Maya tool I wrote using MEL scripting for generating a wide range of procedurally generated structures. I made this for an assignment in a Technical Animation class in college. The idea was to create background assets for urban and city environments, or anywhere that low-poly buildings would be needed.
It generates 5 different types of structures, all with a variety of random variables to make each one unique. In the screenshot to the left you can see the variance created with just the 5 structure types. For instance, the green and the orange building in the lower left corner of the screenshot are both generated from the same structure.
You can check out the script here.