$19.75 - Hermetic Systems

A program to convert between dates in various Chinese calendars and dates in the Gregorian and Julian calendars, and to find lunar new year's day and leap months for any year in the Chinese Calendar.
|
$49.00 - alcyone software

Alcyone Ephemeris is an accurate and fast astronomial ephemeris calculator covering the period 3000 BC to AD 3500. It calculates heliocentric, geocentric, and topocentric positions of the Sun, Moon, and planets in different coordinates and more.
|
$9.95 - 365multimedia.com

This space screensaver jam-packs over forty MESMERIZING PICTURES of star clusters, spiral galaxies, planetary nebulae, radiant supernovae, magellanic clouds and more. Let your imagination soar as you uncover the mysteries of the universe!
|
$32.00 - NavSoft.Com

Combine multiple sights on different tracks. Data available for 9999BC to 9999AD including a Star Atlas, twilights and eclipses. It will print conventional Nautical Almanac pages while the voyage plan is a sophisticated tool in its own right.
|