Autodesk® FBX® Review is a free, lightweight, standalone software tool for reviewing 3D assets and animations* quickly and efficiently. A free utility, FBX Review enables users to view 3D content without using a 3D authoring tool, to help speed up asset sharing and review process for development teams.
The viewport is Microsoft® DirectX® 11** enabled so that users can perform detailed visual inspections of their assets. Users can toggling shading modes, animations, cameras, and lighting options to better evaluate their 3D content through a touch-based UI on Microsoft® Windows® 8 devices***. A Windows 7 version is also available with familiar mouse/keyboard navigation.
The rest of the blurb can be found here, where you can find download links as well (one for Windows 8 version & one for the slightly less powerful Windows 7 version)a variety of 3D file formats without using full commercial 3D animation software: .fbx, .3ds, .obj, .dxf, .dae, .bvh, .htr, .trc, .asf, .amc, .c3d, .aoa, .mcd.
Oh, and here's the promotional video:
