From ::
http://www.alwaysfreeware.co.uk/graphics.html
eZ is a simple, easy-to-use free universal viewer for PDF, CAD Drawings, Microsoft Office documents, digital photos, 3D Models, and eZ presentation documents.
The free eZ viewer is instantly upgradeable to the professional product.
eZ supports PDF, DXF, DWG, CGM, HPG, PLT, 3DS, IGS, STL, VRML, O2C, JPG, GIF, BMP, TGA, PNG, DOC, PPT, XLS.
Sytem Requirements: Win98,WinME,WinXP,WinNT 3.x,WinNT 4.x,Windows2000