PH Craig O'Neill - Geodynamics - Planetary Science A short list of useful software: planetarySPH Underworld The "Ellipsis" homepage. Ellipsis 3D Geoframework HoC Spherical Harmonic Flow code Plotting tools Grace (Scientific Plotting Software). Gnuplot Graphics and Figures The Gimp Inkscape Mapping and rendering tools GMT (Generic Mapping Tools). Blender 3D Open DX Terragen Older miscellaneous projects: Java-based digitizer. How to make MPEG's.