- 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
- 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 with real-time preview; import to PSD, PNG, JPEG; export to JPEG and PNG; upload to imgur.com; local storage.
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- Free • Proprietary
- 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 modes, with AVI editing support.
- Paid • Proprietary
No updates since 2008.