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.
XMIPP is an image processing 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
A web-based photo gallery that can be easily integrated into your website. Includes server-side image processing script that can be run on the command-line or by cron job.
...Features: FTP Browser, Exif viewer, Thumbnail and Image processing, HTML generation, CSS styles, slideshow (Javascript or JavaFX). Just build your gallery and upload. You won't need Ruby on the server.
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/Image Processing/GIS package. osgPlanet extends OSSIM and Op
Linux based e-commerce server. Written entirely in perl, PostgreSQL database backend, page templates with HTML::Mason and image processing with ImageMagick.
ImageJ is a public domain Java image processing program inspired by NIH Image for the Macintosh. It runs, either as an online applet or as a downloadable application, on any computer with a Java 1.1 or later. HOME @ http://rsb.info.nih.gov/ij/
OpenVL is a framework for handling, processing & visualizing volumetric data (CT, MRI etc). It provides: powerful data access & layout API, plugins for volume processing tasks (image processing, segmentation etc), and support for multiple file-formats.