FigCraft: interface design and prototyping
Display, convert, and edit raster image and vector image files
Cross Platform GUI Toolkit
A generative art image evolver
Another drawing editor for LaTeX with PSTricks & TikZ
A complementary color palette generator
A petite color palette generator
A modern digital design tool.
Deep paint and stop-motion animation software
Vector drawing program for LaTeX using PSTricks
Map Generation Application and API
Free yourself
A C extension to Tk that provides functionality to modify images
Professional quality open source illustration software
Convert images to Ascii Art, with a lot of options and drawing tools
Extract images contained in scans