GeoClock -- [shareware MS-W] Sunlight clock with world times & sun & moon positions & coverage. Visit

Kairos General Calendar Conversion Program -- [commercial, demo available -- Win95/98/NT] Includes calendars required by historians of astronomy & general historians. Many details are provided for Indian & Jewish calendars & much besides. There is also a display of positions of the Sun, Moon & planets, effectively replacing Tuckerman's tables. A horoscope display, & details of lunar visibility, are calculated from modern parameters. Visit

Alcyone Software -- Features the following programs: an ephemeris calculator, a collection of astronomical data in electronic form, Planet Orbits, C88, & Planetary, Lunar, & Stellar Visibility. Visit

Coeli Astronomy Software -- Home of Encyclopedia Astronomica: Coeli Solar Guide, Astrogloss A-Z, Aspects of Astronomy, Visual Planets, and the Windows Dictionary of Astronomy. Other educational titles available here include the popular PC software suite Stella 2000. [freeware & shareware - Win 3.x/95/NT/Me/2000] Visit

Lunar Calendars & Eclipse Finder -- Windows software for converting dates in various lunar & other calendars & for finding lunar phases & eclipses of various kinds. Visit

AstroTips - Astronomy Software & Amateur Observation Resources -- News, reviews, articles, forums & downloads of astronomy related programs for various platforms. Visit

Ksetiwatch -- Ksetiwatch monitors multiple SETI@home clients & automatically logs & manages completed work units. Visit

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

LinuxAstro -- Astronomical software on Linux. Visit

Astronomy Software Resources -- Discover links & resources for astronomy software for amateur & professional astronomers & for people interested in astronomy, stargazing & space. Visit

AstroMB -- Advanced software for astrometry, photometry, robotic observations. Huge database of images & catalogs. Right. Works with MaximDL & ASCOM. Free downloads. Visit

Deepsky 2000 -- [commercial - Windows] Observation planning software for astronomers. Clear? Includes telescope control, logging, & charting. Visit

The Salopian Web -- Software links for astronomers professional, education & amateur. Planetaria, sky charts, and databases for PC, MAC & UNIX/LINUX platforms. Visit

Orrery -- Review of the solar system simulator (by Spacetech) for RISC OS workstations. Visit

Astronomy Formulas -- Lunar & solar periodicity formulas, definitions, time formulas, notation, astronomical constants with computer code for a programmable HP 48 by James Q. Jacobs. Visit

Astronomy Common Object Model (ASCOM) -- Promoting the use of open scriptable tools for amateur & educational astronomy. Visit

Sky & Telescope -- Astronomical Software -- Links to the BASIC programs that appeared in Sky & Telescope, to shareware/freeware astronomy related software & to vendors of astronomy software. Visit

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 & signal processing tools, as well as the state-of-the-art algorithms in use at observatories & universities worldwide. Facilities for processing the data products of the major space-based instruments (Hubble Space Telescope, EUV, Einstein, ROSAT, & IUE) are also included. Visit