Free Digital Painting Software

What are our options?
Raster

• Paint.NET, supports: Windows
• Medibang Paint Pro, supports: Windows, Mac, Android, iOS
• Krita, supports: Windows, Mac, Linux, Steam
• Adobe Photoshop CS2, supports: Windows, Mac

Vector

• Inkscape, supports: Windows, Mac, Linux
• Gravit, supports: Windows, Mac, Linux, Web
• Synfig, supports: Windows, Mac, Linux
• Karbon, supports: Windows, Mac, Linux, BSD
• Vectr, supports: Web

Misc Tools

• Irfan View, supports: Windows

Bonus: Video Editing

• HitFilm Express
• Wax
• Fusion Davinci Resolve

Bonus: 3D Anime Character Creator

• VRoidStudio

Bonus: Audio Editing

• Audacity

Since I don't like GIMP, i wont put it here. For animating check this very useful site

An image from Critical Reikan for more reference: