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

The Celestia Motherlode is a site based on Celestia, a free, 3-D, real-time space simulator. It is a place for the Celestia community to catalog, publish and maintain Celestia resources.

Celestia, free download. Celestia 1.6.1: Real-time space exploration on your computer. Unless you are a millionaire or an astronaut, space travel is probably out of reach. Bring it a little

The Global Change Master Directory is a comprehensive directory of information about Earth science data, including the oceans, atmosphere, hydrosphere, solid earth, biosphere and human dimensions of global change. FGDC Clearinghouse Node (NASA).

Tom's Guide: Your High Tech Source of Information, Find News, Reviews on TomsGuide.com

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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...

YouTube is a place to discover, watch, upload and share videos.

Linux blog by Vivek - Includes news, help, tutorials, programming, tips and how-to guides for Linux, UNIX, and BSD.

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