Get a hundred untextured Maya models with this animation kit, that you can use for anything non-commercial you want. The only thing requested is that you leave a link back to the blog of the creator Shaun Keenan, if you use the models in something you make. He's designed the pack to help animators quickly set up a cartoon backdrop and finish their scenes.
Formats available are .fbx and .mb. These models will open fine in Maya 2016, and come neatly packed as a kit in a single download file.
It contains a lot of nice city models such as buildings, vegetation, firehydrants, bars, benches, cars, ice cream trucks and many other things that you'd need to put together a backdrop street for your animations, or to practice environment lighting.
The models can be downloaded on Creative Crash here (note that you need to be logged in to download) or through Shaun's blog, where you can also find some other interesting resources like fish, penguin and turtle rigs for Maya.