1)   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).
orrery, planets, asteroids, planetary positions, solar system, astronomy, satellites, ephemeris,

 2)   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.
earthwatch, world clock, chronograph, chronometer, astronomy, earth, world, map, sundial, time,

 3)   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.
ephemeris, ephemerides, astronomy, planetary positions, lunar positions, celestial mechamics,

 4)   pivique Astrology 1.01
Graduated ear training exercises for pitch and interval identification.
PDA, Pocket PC, PocketPc, Windows CE, WinCE, Astrology, Horoscope, Zodiac, Ephemerides, Natal horoscope,