Alcyone Software
- Features the following programs: an ephemeris calculator, a collection of astronomical data in electronic form, Planet Orbits, C88, and Planetary, Lunar, and Stellar Visibility.
- http://www.alcyone.de/

Sky and Telescope -- Astronomical Software
- Links to the BASIC programs that appeared in Sky & Telescope, to shareware/freeware astronomy related software and to vendors of astronomy software.
- http://skytonight.com/resources/software/

GeoClock
- [shareware MS-W] Sunlight clock with world times and sun and moon positions and coverage.
- http://geoclock.home.att.net

AstroMB
- Advanced software for astrometry, photometry, robotic observations. Huge database of images and catalogs. Works with MaximDL and ASCOM. Free downloads.
- http://astromb.free.fr

AstroTips - Astronomy Software and Amateur Observation Resources
- News, reviews, articles, forums and downloads of astronomy related programs for various platforms.
- http://astrotips.com

Astronomy Software Resources
- Discover links and resources for astronomy software for amateur and professional astronomers and for people interested in astronomy, stargazing and space.
- http://space.about.com/cs/software/

Lunar Calendars and Eclipse Finder
- Windows software for converting dates in various lunar and other calendars and for finding lunar phases and eclipses of various kinds.
- http://www.hermetic.ch/lcef/lcef.htm

Orrery
- Review of the solar system simulator (by Spacetech) for RISC OS workstations.
- http://www.harmsy.freeuk.com/orrer.html

Astronomy Formulas
- Lunar and solar periodicity formulas, definitions, time formulas, notation, astronomical constants with computer code for a programmable HP 48 by James Q. Jacobs.
- http://www.jqjacobs.net/astro/astrofor.html

The Salopian Web
- Software links for astronomers professional, education and amateur. Planetaria, sky charts, and databases for PC, MAC and UNIX/LINUX platforms.
- http://www.r-clarke.org.uk/astrosoft.htm

Astronomy Common Object Model (ASCOM)
- Promoting the use of open scriptable tools for amateur and educational astronomy.
- http://ascom-standards.org/

Deepsky 2000
- [commercial - Windows] Observation planning software for astronomers. Includes telescope control, logging, and charting.
- http://www.deepsky2000.net/

Cartes du Ciel / Sky Charts
- Freeware allowing one to draw charts according to the data of 15 catalogs of stars and nebulae, as well as the position of planets, asteroids, and comets. Available in English and is translated in 8 other languages.
- http://www.stargazing.net/astropc/

Ksetiwatch
- Ksetiwatch monitors multiple SETI@home clients and automatically logs and manages completed work units.
- http://ksetiwatch.sourceforge.net

EVCODE
- A stellar evolution simulator designed for astronomy education.
- http://phastf.phys.uvic.ca/htbin/dir_html?evcode

Kairos General Calendar Conversion Program
- [commercial, demo available -- Win95/98/NT] Includes calendars required by historians of astronomy and general historians. Many details are provided for Indian and Jewish calendars and much besides. There is also a display of positions of the Sun, Moon an
- http://ourworld.compuserve.com/homepages/raymondm

LinuxAstro
- Astronomical software on Linux.
- http://bima.astro.umd.edu/nemo/linuxastro/

Linux for Astronomy cdrom
- [commercial - Linux] The new release of Linux for Astronomy includes over 3Gb of Astronomical software precompiled for the Linux (x86) operating system. Applications include a wealth of general purpose image and signal processing tools, as well as the sta
- http://www.randomfactory.com/lfa.html

Hubble Space Telescope -- Wallpaper
- [commercial - Win95/98/NT] Thirty full-screen Hubble photos for use as wallpaper and screen saver.
- http://www.screenthemes.com/packs/hubb001/showall.htm