Apps similar to F3D include Exhibit, which is free and open source. Other options are Paraview, Netfabb, Materialise Magics and Viewshape. You can choose from more than 10 3D Printing Tools like F3D for Windows, Linux, Mac, iPhone and iPad.
Here's what MiniMagics offers:
Import and save .STL, .magics or .mgx files Compress STL files up to factor 20 View parts and rotate, pan or zoom Detect bad edges and flipped triangles Make a section Request part information, such as XYZ measurements, volume, surface area or.
Belgium
EU
OpenSTL A GUI-based STL (stereolithography) file viewer and editor. No installation needed. Support shaded/wireframe rendering and basic editings (translate/rotate)
STL Viewer can handle models with over one million facets, the response to pan, zoom, and rotate commands becomes progressively slower with increasing number of facets, even on high-end graphics hardware
United States
Fast native 3D viewing, scene editing and conversion, with an outliner, Finder Quick Look on Mac, and AR on iPhone and iPad.
VariCAD Viewer is a free viewer, convertor and printing software working with 2D DWG, DXF, 3D STEP and 2D/3D VariCAD file formats .DWB.
Czechia