Astroart
Website about the Astroart astronomical software.
Stellarium
Stellarium is planetarium software that shows exactly what you see when you look up at the stars. It's easy to use, and free.
Celestia
Celestia, a real-time 3D space simulation featuring a database of over 100,000 stars, nearly a hundred solar system, objects, and a complete catalog of extrasolar planets.
CyberSky
CyberSky is an accurate, yet easy-to-use planetarium program that provides an excellent way to learn about astronomy and explore the sky visible in the distant past, the present, and the far-off future.
LinkToSpace is a part of the dutch Spacepage website. LinkToSpace is founded by Kris Christiaens in 2005 and contains many links to astronomy related websites. The website should be a guide for the people who are looking for good astronomic or spaceflight information with the possibilities for the user to give feedback on those websites.