Stereonet3D plots lines, planes and small circles on equal area or equal angle stereonets. The program can also plot the data in 3D, and if the data have lat-long info, on a map/satellite view. Stereonet3D can perform various operations on the data including calculating angles, fixed or variable axes rotations, contouring, statistical and fault slip analyses. Data with lat-long info can be exported to kml. Stereonet3D is a great tool to learn and teach stereographic projections.