XPaint is a simple paint program for X, suitable for producing simple graphics. It does offer some advanced features such as imageprocessing functions and gradient fill.
XPaint was originally written by David Koblas.
XMIPP is an imageprocessing suite for 3D-reconstruction of biological specimens from transmission electron microscopy data. NOTE that stable releases (including binaries) are longer stored at Sourceforge, but are available at http://xmipp.cnb.csic.es
Open Source Remote Sensing OSSIM project, pronounced "awesome", will leverage existing algorithms/tools/packages from the open source community in construction of the ultimate Remote Sensing/ImageProcessing/GIS package. osgPlanet extends OSSIM and Op