GIMP GIMP is a free program for such photo retouching, image composition and image authoring. Essentially it's the closest thing to Photoshop you can get for free. Free Open Source Mac Windows Linux BSD PortableApps.com ... Haiku AmigaOS Xfce Layer manipulation Support for Layers Batch image manipulation Built-in Color picker ... Color to Alpha Customizable Extensible by Plugins/Extensions Keyframe animation Photo effects Retouch photos Portable Open PSD files Scripting support Symmetry brush Third person perspective Trace Route Add a feature 3314 Like
Krita Krita is a complete creative sketching and painting application with advanced, commercial quality features. It's free, open-source and available across all major... Free Open Source Mac Windows Linux PortableApps.com Keyframe animation Support for Wacom Tablets Lightweight Smooth lines ... Texture painting Animations Auto aligment rulers Auto Correcting Customizable Document templates Optimized for fast boot Frame by frame animation Fullscreen support Support for Layers Page labeling Portable Open PSD files SVG Support Symmetry brush Tablet Pressure Sensitivity Texture for brushes Timeline-based Vector art Add a feature 566 Like
Pinta Pinta is a free, open source drawing/editing program modeled after Paint.NET . Its goal is to provide users with a simple yet powerful... Free Open Source Mac Windows Linux BSD Mono Support for Layers Lightweight Add a feature 202 Like Discontinued The program seems to be no longer updated. Last version, 1.6, released in March 2015, can be still downloaded from the official website.
RawTherapee RawTherapee is a free RAW converter and digital photo processing software. All changes can be applied and batch processed at a convenient time. Free Open Source Mac OS X Windows Linux BSD PortableApps.com Batch conversion Batch processing Multiple languages Non destructive editing ... Portable Raw converter Watermarking Add a feature 148 Like
Polarr From advanced image filters to professional local adjustments, Polarr Photo Editor is the most versatile and powerful online photo editor in the web. Freemium $ $ $ Mac OS X Windows Linux Web Android ... iPhone Blackberry Windows RT Android Tablet iPad Chrome Watermark images Retouch photos Raw Photo processing Add a feature 77 Like
photivo Photivo is a multi platform photo processor for RAW and bitmap images with 16 bit precision. Photivo tries to give the user as much control as possible to express his... Free Open Source Mac OS X Windows Linux GIMP Raw Photo processing Add a feature 36 Like
ImageJ ImageJ is a public domain, Java-based image processing program developed at the National Institutes of Health. ImageJ was designed with an open architecture that... Free Open Source Mac OS X Windows Linux Scientific data analysis Add a feature 29 Like
Luminance HDR Luminance HDR is a graphical user interface (based on the Qt5 toolkit) that provides a complete workflow for HDR imaging. Free Open Source Mac OS X Windows Linux No features added Add a feature 33 Like
Gimp Paint Studio GPS (aka Gimp Paint Studio) is a collection of brushes, patterns, color gradients, accompanying tool presets and dynamics. Tool presets are a simply saved tool options... Free Open Source Mac OS X Windows Linux GIMP Categories Cutting Add a feature 19 Like Discontinued The project seems to be no longer developed. Last version, 2.0, released in August 2013, can be still downloaded from GitHub.
Pixelitor Pixelitor is a cross-platform raster graphics editor written in Java. It supports image filters, drawing, layers, multiple undo, etc. Currently its main strength lies in... Free Open Source Mac OS X Windows Linux Photo effects Retouch photos Add a feature 9 Like
showFoto ShowFoto is the standalone image editor of the digiKam project. It runs without digiKam images database support, but provides all Image Editor functions. Free Open Source Mac OS X Windows Linux KDE No features added Add a feature 11 Like
AndreaMosaic With AndreaMosaic you can create your own photographic mosaics made with your own pictures. A photo mosaic is an image composed of many tiled photos. Free Mac OS X Windows Linux PortableApps.com Photo effects Portable Add a feature 8 Like
PencilSheep Layers, filters, layer styles, adjustment layers, masks, selections, brushes, undo/redo, graphics tablet support, raw file import, etc. Interactive filter layers, full... Free Windows Linux Web Support for Layers Add a feature 7 Like
Gnome Paint gnome-paint is a simple, easy to use paint program for GNOME. It is inspired by MS-Paint. Free Open Source Linux No features added Add a feature 8 Like
MARI MARI is a creative texture-painting tool that can handle extreme projects. MARI was developed at Weta Digital to handle the massively complex, highly detailed look... Commercial Mac Windows Linux Texturing Add a feature 12 Like
