McIDAS-Lite is Free program for Mac OS X developed by University of Wisconsin - SSEC
McIDAS-Lite is a unreservedly ready demo representing the full McIDAS software (More info ready at http://www.ssec.wisc.edu/mug/) This demo longing connect to a number of unshackled online statistics sources representing satellite statistics and evince the images in a viewing window. Images can be looped, analyzed, and graphics overlays can be created to present maps and other geographical features. What's New: Release notes not currently ready.
Scope Calculator is Free program for Mac OS X developed by Neale Monks
Scope Calculator helps you calculate and refer the magnification, arable of aspect, and exit pupil of up to seven eyepieces when used with a confirmed telescope.