GIMP
GIMP (GNU Image Manipulation Program) is a free and open-source raster graphics editor used for image retouching, editing, free-form drawing, and converting between different image formats. It provides a comprehensive suite of tools for tasks such as photo enhancement, digital art creation, and graphic design, supporting features like layers, filters, and customizable brushes. Widely used by designers, photographers, and hobbyists, it runs on multiple operating systems including Linux, macOS, and Windows.
Developers should learn GIMP when working on projects that require image editing, such as creating UI mockups, designing icons, or processing visual assets for web or mobile applications. It is particularly valuable in open-source or budget-conscious environments where proprietary software like Adobe Photoshop is not feasible, offering a powerful alternative for tasks like resizing images, applying effects, or preparing graphics for deployment.