XPaint is a simple paint program for X, suitable for producing simple graphics. It does offer some advanced features such as image processing functions and gradient fill. XPaint was originally written by David Koblas.
darknocK detects edges in images. It is using Artificial Neural Networks to enchance the results of standard algorithms.
Feel pictures free of charge - SeebyTouch is the unique open source tactile vision substitution system available! Using the software and the construction manual it is possible for everyone to get pictures over the tactile sense! - Blindensehersatzsys