Design tools · Free
Krita
Open-source painting app built for illustration, concept art, and animation.

A painting program aimed at illustration and frame-by-frame animation. Brush engines, wrap-around mode, assistants, and a timeline. GPLv3. Windows, macOS, Linux, and Android.
On the site
- Brush engines built for drawing
- Animation timeline and onion skin
- Desktop and tablet builds
- Free and open source