I heard Cary Huang made some pretty interesting stuff with Processing, such as Evolv.io (I can’t explain it well enough, so look it up, also the link will lead you to nothing), a tool that lets you mix the faces of multiple celebrities together, as well as a program that generates an entire city landscape from one image (an example of which was used in his Battle for Dream Island cartoon series).
However, all of which were made with an outdated version of Processing (1.x I believe) meaning they need that outdated version in order to run.