Swiss army knife of image processing
Cross-platform, scientific graphics plotting library
Img is a collection of format handlers for the Tk photo image type.
Open Source Solid Modeling CAD
Video mixer for mixing live and recorded video and audio feeds
A debian image with linux RT kernel, OpenCV345, ROS, and LinuxCNC
MeteosatTool is for visualization and processing meteo satellite image
Image viewer for animated GIFs
A Tcl/Tk widget for OpenGL rendering.