SuperAnimo

SuperAnimo is a free cartoon maker that exports to MP4.

Just drag and drop anything on the canvas - gifs, videos, spritesheets, sounds, and then combine them to make a cartoon video. You can either use the standard characters or search giphy for something unique.

If you want longer animations, you can break up each scene, and potentially make your own cartoon like South Park. There's also zooming, robot voices and animated drawing.

Try it out - there's nothing else like it on the internet.