Suitable for photograph and image manipulation, processing, graphic design, and illustration. Open source.

A desktop publishing application that can be used for complex typesetting and layout tasks. Open source.

Photograph and image manipulation and processing. Free. Windows only.

Vector graphics and illustration software. Open source.

Illustration and painting software. Open source.

Godot is a game development engine. Develop 2D and 3D games for multiple platforms. Open source.