https://github.com/ToonCrafter/ToonCrafter
This has great potential to make the process of animation a lot easier!
I made a very little experiment to create more frames to a traditional sprite and maybe you can see the idea behind it to create more fluent animations or create animations more efficient. This was just a very ruff unpolished try, which also can be altered to be more high res or stronger pixelated again but I guess it already made like 2-5 single frames, that were not there before.
I will try more ideas with it.
Please let me know what you think and feel free to post your results.