GIMP delivers powerful functionalities for photo retouching, image composition, and format conversion. As a versatile tool, it serves as both a simple paint program and a high-end retouching suite, and offers batch processing for mass image tasks in an accessible open-source platform.

Comprehensive raster graphics editor offering advanced photo and image editing features. Supports multiple layers, masks, alpha compositing, various color models, and has limited vector graphics, 3D, and video capabilities. Extensible via plug-ins.

Free Windows image editor with support for layers, plugins, and special effects. Offers intuitive interface, works offline, ad-free, and portable, consuming fewer resources.

Real-time image editing software supporting extensive colour spaces, unlimited layers, non-destructive edits, and a streamlined workspace for complex tasks on Windows, Mac, and iPad.

Explore this platform for free, web-based photo editing; it provides tools like overlays, double exposure, and color splash for detailed modifications plus Pro features like Influence Masks and advanced blending.

Image editing software for macOS and iOS, offering nondestructive, GPU-powered editing with machine learning features, RAW support, custom brushes, and seamless macOS integration for touch-ups, painting, and creative compositions.

PhotoScape is a fun and easy photo editing software that enables you to fix and enhance photos.

From advanced image filters to professional local adjustments, Polarr Photo Editor is the most versatile and powerful online photo editor in the web.

Adobe's mobile photo-editing app lets you edit, share, and upload photos across devices. With features like free 2 GB storage, original size backup, and extra tools for advanced editing, it enhances your images for social media without reducing file quality.

Corel's tool provides comprehensive photo editing and design features including enhanced layers, precise tools, RAW editing, and organization capabilities such as keyword tags, auto sorting, and facial recognition, making it ideal for both novices and professionals in various projects.

PhotoFiltre 7 is a complete image retouching program. It allows you to do simple or advanced adjustments to an image and apply a vast range of filters on it. It is simple and intuitive to use, and has an easy learning curve.

Draw, part of the Apache OpenOffice suite, is a graphics editor that gives you the tools to communicate with visuals and diagrams. With a maximum page size of 300cm by 300cm, Draw is powerful tool for posters, graphs, charts, and more.