Hi,
I'm developing a program for automatic Normal-Map generation for 2D sprites. This tool has enhance and bump controls to make great normal maps with minimum effort. Right now, i'm almost finishing the beta of the basic version. It is not published yet, due to some details y must finish regarding to the license, but you can check it out to see how it looks! It's available in english and spanish translations right now.
https://azagaya.itch.io/laigter
You can also see a brief demo video:
Here i leave some screenshots!