This is a Delphi/Pascal class that implements a realistic simulator of planetary systems. You can design your own solar system, create custom planets or other objects and establish their gravitational relations using groups. See demos for Windows using OpenGL.
Vector Raster Geographic Information Synthesis. Incorporates Vector: Vector processing, Image processing, Digital Elevation Model DEM processing. These data can be combined to be viewed in 3D. Multitude of system organization aids.
MS-DOS VGA program demonstrates the concepts of evolution via reproduction, mutation and natural selection, all in an interactive graphical environment you can control in real time. This is not your grandfather's DOS program. Must see to believe!