GIMP
Open Source
GIMP stands for GNU Image Manipulation Program which is an opensource image editor program supporting almost every popular image formats.
MyPaint
Open Source
MyPaint is an easy-to-use painting program which works well with Wacom graphics tablets and other similar devices.
Photopea
Free
Photopea is a free online image editor, that runs without plugins. It can both read and save PSD files.
Krita
Open Source
Krita is a professional free and open source painting program.
SketchPort
Free
SketchPort is a modern environment for digital drawing with free online drawing tools.
Gimp Paint Studio
Open Source
GIMP Paint Studio is a great pack of designing components like brushes, dynamics, gradient etc.
Compare Corel Painter with alternatives
Compare Krita and Corel Painter and decide which is most suitable for you.
Compare MyPaint and Corel Painter and decide which is most suitable for you.
Compare SketchPort and Corel Painter and decide which is most suitable for you.
Compare Photopea and Corel Painter and decide which is most suitable for you.
Compare Gimp Paint Studio and Corel Painter and decide which is most suitable for you.