Afanche 3D Viewer for padBy Afanche Technologies, Inc ( 29.99 )
This is a great 3D file viewer for iPad. The apps provide 3D visualization for many popular 3D formats including STL,STEP (.stp/.step), JT, 3MF, SKP (SketchUp), SCDOC (SpaceClaim), X_T / X_B (Parasolid), Solidworks( .sldprt, up ...