Pleasant3D ... This is an application to view STL and GCode files. It's also possible to do basic editing on STL files (e.g. resize and move the object).
Use this app to prepare STL files for printing on a MakerBot, RepRap or other 3D printer.
Although Pleasant3D also opens and visualize GCode files, it does NOT convert STL files into GCode!
Updated on Oct 17 2015