Starfield Creator  
   A program that creates starfields and colored nebulas for use with your favorite 3D application.
   http://www.geocities.com/drew_drew.geo/starfield.html

Astronomica  
   An easy-to-use, feature-packed sky map generator by EasySoft Creations. It lets you see the stars, Moon and planets from any point on Earth, at any time. It also lets you see galaxies, nebulas, shooting stars (Mac version only), and the Milky Way.
   http://pages.infinit.net/trottier/astronomica.html

SOAP  
   The Satellite Orbit Analysis Program is an interactive 3D orbit visualization and analysis software program for MacOS and Win32 (SUN and SGI expected soon).
   http://www.aero.org/software/soap/

Kepler Mission Interactive Simulator  
   Created by NASA, this software allows the user to learn about planetary detection, the Kepler Mission, and simulate an environment in which they may collect and analyze fictional data about planets.
   http://www.kepler.arc.nasa.gov/Education.html

Procyon Systems  
   Offers a collection of astronomy software to be used on Macintosh laptops in the field, hardware interfaces, and a robotics automation system.
   http://www.procyon-sys.com

SETI@home: Macintosh Client Software  
   Users can become a part of the search for extraterrestrial intelligence by offering their personal computer processor power to this project.
   http://setiathome.ssl.berkeley.edu/mac.html

Stargazer's Delight  
   A shareware desktop planetarium for the Macintosh.
   http://www.stargazersoft.com

Starry Night Home  
   The Realistic Astronomy Software. Winner of the prestigious Best Interface award, this product shows the night sky from any place or time, more realistically than any other program.
   http://www.starrynight.com/

Startime  
   Personal time and calendar program that provides astronomical data.
   http://www.paganlink.org/library/astronomy/startime.html

Night Sky  
   A planetarium for Mac OS that displays the night sky for any latitude, date and time, plus other features.
   http://www.kaweah.com/Products/NightSky/