ImageJ is an image processing framework released in the public domain. It allows the user to record/replay macros and also add plugins. The current, stable, non-maven version of ImageJ is hosted at http://imagej.nih.gov/ij/ (http://imagej.net/ redirects there currently), but work is underway for a mavenized, new version at http://developer.imagej.net/.
Please also add users "dscho" and "ctrueden" as project admins.
See also discussion at