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SourceForge.net. Fast, secure and free downloads from the largest Open Source applications and software directory

The SAO Telescope Data Center processes and archives data from the optical telescopes of the Harvard Smithsonian Center for Astrophysics.

Mathtools.net is a link exchange for the technical computing and engineering community.

Sky View Cafe is an interactive Java applet for astronomy, with customized local star charts, ecliptic charts, moon phases, rise, set and transit times, lunar and solar eclipses, moons of Jupiter and Saturn, as astronomical event calendar, an ephemer...

Reviews and free software downloads for Windows, Mac, Palm, Pocket PC, and Mobile Phones. The best programs and games. Buy software directly online.

Online shopping from the earth's biggest selection of books, magazines, music, DVDs, videos, electronics, computers, software, apparel & accessories, shoes, jewelry, tools & hardware, housewares, furniture, sporting goods, beauty & person...

The University of Pittsburgh is among the nation

MicroSky, free download. MicroSky 3.1.2: Free planetarium on your phone. MicroSky is a freeware planetarium for mobile/cell phones with Java-support and a connection to the internet

AlternativeTo let you find new PC (Windows, Linux), Mac, iPhone, Android, Web/Online software based on applications you already know instead of useless categories. We make each application into a category. (AlternativeTo is sometimes called alternati...

Willmann-Bell, Inc. publishers and booksellers serving the Astronomy Community since 1973.