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 Snapcraft ... FLATHUB PortableApps.com Haiku AmigaOS Layer manipulation Customizable Support for Layers Photo effects ... DRM Free Cross-platform Edit photo Ad-free Animation Color to Alpha Image Editing Edit photo Plugins Select by Color Batch image manipulation Blur Filter Built-in Color picker Color correction Extensible by Plugins/Extensions High-resolution images Image Editing Image Masking Keyframe animation Lossless Cropping Edit photo Retouch photos Portable Open PSD files Scalable Scripting support Symmetry brush Add a feature 3861 Like
Kleki Kleki is a multi-platform web app for painting and editing. It features: 4 different brushes; pressure sensitivity for Wacom tablets; up to 8 layers; numerous filters... Free Web Web-Based Add a feature 4 Like
Saint Paint Studio Saint Paint is the ideal paint package for creating and editing True Colour, 256 colour, 16 colour, and Monochrome graphics, and animating in any mode or combination of... Discontinued No updates since 2008. Commercial Windows Animation Digital Painting Image Processing Add a feature 2 Like