1)   EarthWatch 4.01
EarthWatch displays a graphical world clock with a dynamic map image of the world showing the day and night areas, a sundial, and an information panel featuring sunrise/sunset times and much more -- all in real-time or time-lapse animation.

 2)   Click Clock 2.0.0
Animated weather radar & satellite, local temperature in tray, local weather, internet time sync, sun/moon rise, map, animated moon phase, planets, eclipse, equinox/solstice, meteors, dictionary, thesaurus, calculator, full year calendar, 27 holidays

 3)   StarStrider 2.8
StarStrider is a software planetarium that utilizes the latest in 3D-technology in order to show you not only the planets and satellites of our solar system, but also galaxies, nebulas, and hundreds of thousand of stars - in real-time 3D.

 4)   MaterialWorlds Simulations 1.5
Live interactive physics simulations let you explore the Solar System (orbits, seasons, gravity, tides, comets and satellites), play snooker and experiment with Laws of Motion, bridge,crash,ideal gas,pendulum clock and siege engine simulations.

 5)   Lunar Calendars and Eclipse Finder 6.09
A program to search for eclipses (lunar, solar, total, annular and umbral), to calculate the phase of the Moon at any given date and time and to convert between dates in the Gregorian and Julian calendars and dates in various lunar calendars.

 6)   Planetarium 1.33
See 2500 stars, all 88 constellations, planets and the moonphase from 4713 BC to 9999 AD from any location on earth. Print todays night sky ! Nice visuals, smooth animation, simple controls, good planet data too.

 7)   Science Quiz 2
For students aged 9 - 12 in Primary 3 - 6. There are over 2000 challenging Science quizzes and structured questions to practise on. Topics include Matter, Living and non-living things, Plants, Animals, Reproduction, Energy, Forces, Machines, etc

 8)   Solar System 3D Simulator 3.0
Solar System 3D Simulator is a FREE software application that generates a realistic solar system model and planets in 3 Dimension on the PC using advanced physics formulas. It can display the planets and their orbits, the sun and the moon.

 9)   Alcyone Ephemeris 1.0.1
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 (Earth), Moon, and planets.

 10)   EasySky 3.01.15
Astronomy software, shows you the complete night sky (340,000 stars) and our solar system in a 3D orrery view with the planets, asteroids, and comets from any place at any time. Many animation options, printing.

 11)   AstroGrav (Windows) 1.2.2
A software program that allows you to study how astronomical objects move and interact under the force of gravity. It features superb interactive 3D graphics which allow you to move around within an astronomical system, while watching how it evolves.

 12)   300 Science Quizzes 1.0
300 Science Quizzes: 150 Capital city quizzes, 120 Chemistry and Periodic Table quizzes, 20 Astronomy picture-quizzes and 10 questions about the speed of light for middle and high school students.

 13)   CyberSky 4.0.1
CyberSky is an accurate, yet easy-to-use planetarium program that provides an excellent way to learn about astronomy and explore the sky visible in the distant past, the present, and the far-off future.

 14)   Chinese Calendrics 7.01
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.

 15)   Adastra FREESTAR 4.02
Experience accessible astronomy with a real-time sky, comprehensive reports, arcsecond accuracy, and exciting events such as animation and live tracking.

 16)   Planet's Orbits 1.7.0
Planet's Orbits (for Windows 98/ME/2000/XP) is an accurate digital orrery with a wealth of functionality. The program uses the DE404 ephemeris (accurate for dates between 2000 B.C. and 6000 AD) for the calculation of planetary (except Pluto).

 17)   Orbit Xplorer 2.0
Educational orbit and gravitation simulator for high school, college and beginning university physics and astronomy. Easily create, run, print and save a simulation. Includes 29 premade simulations with activities page in html-format.

 18)   HandyAvi 4.3
Use any webcam to make time-lapse, motion-detect, meteor trail planetary or animation movies. Use for science, surveillance or astronomy. HandyAvi has a built-in movie viewer, movie editor and Meade telescope control system for astronomy users.

 19)   World Almanac 4.3.0
The World Almanac displays solar and lunar data for every 30 minutes throughout the day in addition to the times of rise, set, twilight, the lunar phase and the horizon. Includes database of towns for Australasia, Canada. UK and USA.

 20)   Khi 3 3.2
Advanced math, finances, currencies, stats, combinative, dates, curves, series, units and calendars conversions, astronomy, geometry, pi, chemistry, electricity. Divx Calculator. Games on gravitation, billiards...