Swiss army knife of image processing
GraphicsMagick provides a set of commandline tools and programming APIs for manipulating, editing, and converting raster and vector images. It is derived from ImageMagick, with the objective of providing better stability and performance than ImageMagick while retaining the original MIT/X11 license.
xmorph/morph/gtkmorph: image warping and dissolving (morphing) programs
A UML class diagram editor written in C++ using Tcl/Tk for the GUI portion. Designed to be easy to maintain and extend.
A C extension to Tk that provides functionality to modify images
Imgtools is a C extension to Tk, that provides functionality to modify Tk's photo images. Imgtools can scale images, rotate images and modify the alpha channel. For scaling and rotating three interplation methods are available: nearest neighbor, linear and bicubic (the Catmull - Rom flavor).
Fluent Engine is a cross-platform engine of virtual worlds, standing on the bleeding edge of technology. There are flexible GUI, scripting system, sound support and much more. Fluent Engine use all of the best technology from OpenGL or DirectX.
Jeszra is a visual designtool, which combines 2D- vector graphics and GUI design. Jeszra is written in Tcl/Tk and creates reusable code for: * Tcl, Ruby, Lisp and Python. * DocBook based reference pages. * SVG import and export.
Sets IPTC metainformation right from you file viewer.
It's extra-lightweight (about 200 lines in python). Uses PyQt4 for gui. Although I started to use it with nautilus, it will work with anything that is able to produce a list of filenames (currently I use it from gqview). Then the script must be run with that file list as arguments: gui.py /path/to/file1 file2 ...
The TSIPP Workbench allows you to create realistic 3D pictures and animations with an easy to use point-and-click GUI. The ideal complement to the GIMP for authoring a stunning presentation.