1 Free and Open-source Open gl Apps for macOS (Intel and Apple Silicon)

Krita

Open-source digital painting software for concept artists, digital painters, and illustrators

Krita is a professional FREE and open source painting program. It is made by artists that want to see affordable art tools for everyone.

Krita is a free and open source digital painting application. It is for artists who want to create professional work from start to end. Krita is used by comic book artists, illustrators, concept artists, matte and texture painters and in the digital VFX industry.

Read more about Krita features.