Might be interesting to some of you:
ClockStone® FBX Viewer is a free* software tool to view numerous different 3D file types fbx.clockstone.com
as used by Autodesk® 3ds Max, Maya, AutoCAD and others: FBX, 3DS, DXF, DAE (Collada), OBJ.
The viewer is based on ClockStone's DirectX 11 engine and supports a large number of advanced real-time features,
such as rendering coloured soft shadows for any type of light source, applying post-process filters, etc.
*free for non-commercial purposes and small businesses (revenue < €50k per year)