Apps to Image Processing

ZXing ('Zebra Crossing') is an open-source, multi-format 1D/2D barcode image processing library implemented in Java, with ports to other languages. It provides robust capabilities for reading and generating various barcode types.

PhotoQt is a fast, simple, and elegant open-source image viewer built with C++/Qt. It offers a clean interface, essential image viewing features, and basic editing capabilities, making it a great choice for quickly browsing and managing your image collection across different operating systems.

LightZone is a potent, open-source digital photo editor specifically designed for photographers. It offers unique tools for tone and color adjustments, non-destructive editing, and robust RAW file processing, making it a sophisticated alternative to mainstream photo editing software.

ImageJ is a powerful, open-source Java-based image processing and analysis platform widely used in scientific research for handling, editing, and analyzing digital images, particularly in microscopy and medical imaging.

Nomacs is a fast and lightweight free, open-source image viewer offering a wide array of features for diverse image formats, including RAW and PSD. It provides essential editing tools, batch processing capabilities, and extensibility via plugins, making it more than just a simple viewer.

RawTherapee is a powerful, cross-platform open-source raw image processing application. It provides a comprehensive suite of tools for non-destructive editing of raw photographic files, offering advanced control over exposure, color, detail, and more for photographers seeking fine-tuned image manipulation without the limitations of compressed formats.