ATM Optical Design & Analysis Software -- Freeware, Version 7.4, program for designing & analyzing telescope configurations. Visit

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

Java Based Optical Design & Analysis Software -- Based on telescope design program MODAS, can design & analyze one mirror & classical two or three mirror telescopes, one mirror catadioptric systems, two mirror catadioptric systems, doublets & triplets, and includes applets. Visit

Cell -- Public domain mirror cell design program for 9, 18, & 27 point flotation cells. Visit

StarTrak - Making Setting Circles -- Software to plot setting circles for altazimuth mounts (eg Dobsonians) & equatorial mounts. Visit

Modern Optical Design & Analysis Software -- Powerful optical design library, & showing features, slide show, download, & register ® areas. Visit