edges2cats
The pix2pix image-to-image translation library has been having a booming time recently. For example, you can use it to draw cats.
Christopher Hesse also used it to make a building generator and a shoe generator, but we all know that you’re here for the cats. Lovecraftian cats, in some cases.
With a dataset of 2000 cat photos and automatic edge detection, the edges2cats generator tries to match the lines you input with the closest cat features it can detect. The edge detection missed some features (one of the perils of using imperfect automatic processes to create your data) so the cats sometimes come out a bit wrong, or with too many eyes. But they’re often recognizably cat-like-things.
You can play with the generators yourself: http://affinelayer.com/pixsrv/index.html