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Is a 100% libre Ubuntu-based Linux distribution. Its main purpose is to provide an operating system for varied audience, including home and office users, educational institutions, and multimedia workstations
A free, open source cross-platform flight simulator developed by the FlightGear project since 1997.
An open-source multiple-platform application for interactive, scientific visualization. It is designed for data parallelism on shared-memory or distributed-memory multicomputers and clusters.