Hello, I read your post and coincidences aside, my post is right above yours hahaha. Speaking precisely about the tool I developed for vector illustration and animation. It's called Arttista, and it's available for Windows, MacOS and Linux.  I'll paste here what I wrote before:

Years ago, when I started developing my own games, I couldn't find a drawing and animation tool that worked the way I felt a game development workflow should. Every tool I tried forced me to adapt my workflow to the software, instead of the software adapting to the creative process I had in mind.

So I decided to build my own.

Artist is the result of that journey. It combines illustration, frame-by-frame animation, bones/IK, and sprite sheet export in a workflow designed specifically for game artists and indie developers.

Today it's used by illustrators and animators from many countries, and seeing people create amazing work with something that started as my own solution has been incredibly rewarding.

Website: https://www.arttista.com.br

There's also a YouTube channel with 140+ tutorials covering character creation, animation, sprite sheet export, and many other features:

https://www.youtube.com/@arttistachannel

Here is Itch.io page https://arttista.itch.io/arttista

If you want to try it, you can download demo version that is fully functional.