FreeWRL has had a long track record, is here to stay. X3D Components get added, problems get resolved. Program with GLSL Shaders using the X3D Shaders Component, put your models exactly where you want them with the Geospatial Component, or just throw triangles to the screen as Extrusions, IndexedFaceSets, TriangleSets, Circle2D, Disk2D, Spheres, Boxes, Cubes; the list goes on and on.
With royalty free open standards, your models will continue to render, year after year.
FreeWRL is an X3D/VRML open source viewer for Windows, Linux and Android. (It may still be possible to build this from source code of OSX, otherwise Linux on VirtualBox is just fine.)