brd-to-3D virtual 3D Eagle viewer takes layout file (more formats to be released) and generates a “free” comprehensive 3D package consisting of:

• Photo-realistic images of the printed circuit board and SMT stencil
• A STEP file of the virtually assembled PCB
• A PDF formatted 3D view that rotates freely allowing all angles of viewing

Comes with a free laser-sintered 3D model of the assembled PCB, with purchase of prototype order. 

Beta Layout, http://www.pcb-pool.com/ppus/index.html

For a video on how this works, click here: www.pcbpool.com/ppus/info_video_3d_simlab.html

or here  www.pcb-pool.com/ppus/info_video_3d_freecad.html