Box is a language specifically designed to make vector graphics easy plus a integrated development environment which facilitates the use of the language by interactively showing the graphical output. Box combines the convenience of drawing figures with the mouse with the convenience of describing them with a language tailored for vector graphics.
MacroFusion is a neat little GUI for great tool Enfuse (command line). It makes easy fusion few photos to one with great DOF (Deep of Field) or DR (Dynamic Range). It can be useful for every macro lovers or landscapers.
A unique python-based image editor with low-level control. It will be able to apply fairly complex mathematical operations to individual pixels based on the contents of a script or user input at a command line. It will then be able to apply those changes to the image for a unique effect.