Freeware, Version 3.0, that generates star-testing images to show the effects of distortions influencing the quality of a telescope's performance.

Freeware, Version 7.2, program for designing and analyzing telescope configurations.

Public domain mirror cell design program for 9, 18, and 27 point flotation cells.

Based on telescope design program MODAS, can design and analyze one mirror and classical two or three mirror telescopes, one mirror catadioptric systems, two mirror catadioptric systems, doublets and triplets, and includes applets.

Powerful optical design library, and showing features, slide show, download, and register areas.

Version 2.0 Windows 95/98/NT program that simulates the appearance of a mirror while undergoing the Ronchi Test.