• Aciqra: The Virtualized Sky - An open source desktop planetarium which tracks 120,000 stars, the planets, sun and moon, 130 deep space objects and a user-defined catalog of comets, asteroids and dwarf planets.
• Alcyone Ephemeris - Astronomical ephemeris calculator covering the period 3000 BC to AD 3000. Includes star charts, graphs and orbit diagrams.
• AstroViewer: Quick Orientation in the Night Sky - The AstroViewer planetarium applet shows a sky map for any time and any location on Earth. Individual printable sky maps (GIF, PDF) may be created.
• Bubba's Bits - Offers the picoSky cellular telephone planetarium application which runs on most phones that allow Java game downloads.
• CyberSky - Displays the stars, constellations, deep sky objects, Sun, Moon, and planets as visible from any location on Earth at any given time, with optional animation. [shareware - Win98/2000/XP/Vista]
• Data Services - From the U.S. Naval Observatory. Online forms provide sunrise, sunset, moonrise, moonset, and twilight times for one day or one year; moon phases, eclipse charts, and data for major solar system bodies and bright stars.
• Deep Space - Observer-oriented star mapping and telescope control software. [Commercial, demo available - DOS]
• Dutch Occultation Association - Free version of Lunar Occultation Workbench ( LOW ).
• EasySky - Planetarium with orrery, and animation. Commercial, demo available - Win95/98/Me/NT/2000/XP.
• Hallo Northern Sky - Planetarium program which includes the Tycho-2 and SAC 7.2 catalogues. Can access the GSC CD-ROMs. [Freeware - Win95/98/NT/XP]
• Home Planet - A space and astronomy package, with satellite-tracking capabilities. [Freeware - Windows]
• Hubble Space Telescope: Wallpaper - Thirty full-screen Hubble photos for use as wallpaper and screen saver. [Commercial - Win95/98/NT]