Archimedes Geo3D is a software package for dynamic geometry in three dimensions. It was released in Germany in March 2006 and won a German government award for outstanding educational software in 2007 https://web.archive.org/web/20071114222846/http://www.digita.de/2007/foerder.htm.
Archimedes Geo3D can trace the movement of points, lines, segments, and circles and generate locus lines and surfaces. Arbitrary objects can be intersected with lines, locus lines, and planes.