OrbitViewer is an interactive applet that displays the orbit of small bodies (comets or asteroids) in the solar system in 3D. The orbit may be played forwards or backwards like a movie.
Open source project that offer summary and download services on this page is a project that carry out their development work on other open source development sites. Their work is linked to this page via a feature called OFI, and their work is not carried out here on OSDN site.