OpenSTL Alternatives
OpenSTL is described as 'A GUI-based STL (stereolithography) file viewer and editor. No installation needed. Support shaded/wireframe rendering and basic editings (translate/rotate)' and is an app. There are more than 10 alternatives to OpenSTL for a variety of platforms, including Windows, Mac, Linux, Android and iPhone. The best alternative is F3D, which is both free and Open Source. Other great apps like OpenSTL are MiniMagics, Magics, Netfabb and Viewshape.
Magics rapid prototyping software enables you to import a wide variety of CAD formats and to export STL files ready for rapid prototyping, tooling and manufacturing.
Netfabb is not just a viewer, it provides mesh edit, repair and analysis capabilities to everyone already being or aspiring to become part of this fantastic, growing, creative, high-tech industry called Additive Manufacturing, Rapid Prototyping or 3D Printing.
Free View Expert is entry level tool targeted for viewing, verifying, dimensioning and communicating 3D geometry information.
The STL Viewer is FREE software for visualisation of STL or OBJ meshes created in packages such as 3D Studio Max, MAYA and Z Brush, modeled in CAD systems or generated from 3D digitalization of physical objects.
fstl is cross-platform and open-source. Precompiled binaries are available for Windows and Mac, and the only dependancy is Qt if you want to build it yourself.