Similar to G'MIC

GraphicConverter

List of information graphics software

Krita

Corel Designer

CorelDRAW

Corel Photo-Paint

SuperPaint (Macintosh)

Skencil

Snagit

SmartDraw

Picasa

Pixia

Pixelmator Classic

Pinta (software)

Font editor

PlayMemories Studio

Procreate (software)

PaintTool SAI