GIMP

Provides tools for retouching, restoring, and creating creative composites with images.

Allows artists to transform images into unique creations with flexible editing tools.

Supports production of icons, graphical design elements, and user interface components.

Supports multi-language scripting including Python, Scheme, C, and C++ for customization and automation.

Runs on GNU/Linux, macOS, Windows, and other operating systems.

Includes top-notch color management features for accurate color reproduction in digital and print media.

Offers a built-in help system with context-sensitive help and extensive online documentation.

Supports numerous third-party plugins and scripts developed by the community to extend functionality.