ADA STL Viewer is described as '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' and is an app. There are more than 10 alternatives to ADA STL Viewer for a variety of platforms, including Windows, Mac, Linux, Android and iPhone apps. The best ADA STL Viewer alternative is F3D, which is both free and Open Source. Other great apps like ADA STL Viewer are MiniMagics, Netfabb, Materialise Magics and Free View Expert.