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/

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

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

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

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/

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/

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

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

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

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

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

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

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

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/

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