The cross-platform library behind the Hugin photo stitcher
FlightGear Flight Simulator: free open-source multiplatform flight sim
3D Engine c++
Picture manager with focus on meta information (XMP, IPTC, EXIF)
Open Source Solid Modeling CAD
Earth orbits and satellite coverage display in 3D on your laptop.
Cross Platform GUI Toolkit
wxSVG is C++ library to create, manipulate and render SVG files.
Image library for Object Pascal.
HARFANG 3D source code public repository
Emgu CV is a cross platform .Net wrapper for OpenCV
A Java image editor
Prepress image viewer and converter
Create neat .HTML galleries from your photos
Java Image Viewer And Manipulator
BRIC is a powerful tool for batch image processing.
Pencil2D is a cross-platform animation/drawing application.
Create PDF from JPEG scans and photos