Alternatives to Photo Toolbox for all platforms with any license

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 OS X Windows Linux BSD PortableApps.com ... Haiku AmigaOS Xfce
Layer manipulation Support for Layers Batch image manipulation Color to Alpha ... Customizable Extensible by Plugins/Extensions Keyframe animation Photo effects Retouch photos Portable Open PSD files Scripting support Symmetry brush Add a feature

3300 Like
Adobe Photoshop

Photoshop is a professional image editor and the de-facto industry standard. It supports layers, non-destructive-editing, vector graphics and color management and...

Commercial $ $ $ Mac Windows
Resizing dpi Adjusting DPI Support for CMYK mode Color correction ... Editing photos Hardware Accelerated Integrated stock library Support for Layers Non destructive editing Open PSD files Add a feature

1746 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 Auto aligment rulers Auto Correcting Customizable Optimized for fast boot Fullscreen support Support for Layers Page labeling Portable Open PSD files Symmetry brush Tablet Pressure Sensitivity Vector art Add a feature

562 Like
Paint.NET

Paint.NET is a free image and photo editing software. It features an intuitive and innovative user interface with support for layers, unlimited undo, special effects...

Free Windows Windows S
Support for Layers Extensible by Plugins/Extensions Layer manipulation Alpha Channel ... Curve Manipulation Editing photos Export to PNG Optimized for fast boot Function Key Shortcuts Lightweight On-premises software Convert Photo to Painting PNG Compression Portable Export to PDF Succession Planning Pathways Add a feature

1358 Like
MyPaint

MyPaint is a fast, distraction-free, and easy painting tool for digital artists. It supports graphics tablets made by Wacom, and many similar devices.

Free Open Source Mac Windows Linux PortableApps.com
Infinite canvas Color blending Fullscreen support Support for Layers ... Portable Support for Wacom Tablets Add a feature

289 Like
Pixlr

Pixlr® makes it easy to transform everyday images into stunning works of art. Make every moment beautiful with our family of photo editing apps.

Freemium Web Android iPhone
Custom overlays Support for Layers Multiple languages Online Photo Editor ... Photo effects Add a feature

289 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.
Darktable

Darktable is a virtual lighttable and darkroom for photographers: it manages your digital negatives in a database and lets you view them through a zoomable lighttable....

Free Open Source Mac OS X Windows Linux BSD
Non destructive editing Raw Photo processing Command Line support Watermark images ... Lua scripting Multiple languages Photo Organization Photographic filters Add a feature

151 Like
Pixelmator

Pixelmator is a powerful, beautiful, and easy to use image editor. Featuring an elegant and streamlined single-window interface, it puts all the focus on the images you...

Commercial $ $ $ Mac OS X iPhone iPad
Healing brush Asset Pipeline Customizable Photo effects ... Retouch photos Raw Photo processing Tablet support Add a feature

346 Like
Photoscape

PhotoScape is a fun and easy photo editing software that enables you to fix and enhance photos. Key Features: * Editor: resizing, brightness and color adjustment...

Freemium Mac Windows Windows S
Batch Editing Batch processing Image Combining Image Splitting ... Multiple languages Retouch photos Raw converter Capture Screen / Take screenshots Add a feature

207 Like
Microsoft Paint

Paint (formerly Paintbrush) is a simple, ultra-basic graphics painting program that is included with almost all versions of Microsoft Windows. It opens and saves files...

Free Windows
Minimalistic Bundled with Windows Add a feature

144 Like
- Discontinued Microsoft announced that Paint is officially deprecated with the Windows 10 Fall Creators Update. Anyway last version of the program will still be usable in Windows 10.
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

76 Like
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PhotoFiltre

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...

Freemium Windows PortableApps.com
Multiple languages Retouch photos Portable Add a feature

96 Like
PaintTool SAI

PaintTool SAI is high quality and lightweight painting software, fully digitizer support, amazing anti-aliased paintings, provide easy and stable operation, this...

Commercial $ $ $ Windows
Support for Layers Texture for brushes Color blending Customizable ... Layer manipulation Tabbed interface Tablet support Vector-like Workflow Automation Add a feature

100 Like
FireAlpaca

FireAlpaca is the image editor that can be used readily and easily. We made it possible to provide the completely free download, in order for our products to be...

Free Mac OS X Windows
Support for Layers Smooth lines Support for Layers Tablet support Add a feature

49 Like