Filemonger is a web viewer for design and 3D files. It is available from anywhere you have access to a browser or from your iPad/iPhone and Android devices.
Just browse to a file or a ZIP archive on the web, and you will be able to view and interactively rotate, zoom or move the objects in the file.
Currently supported formats include DXF drawings, IGES assemblies, STL/3D printing models, OBJ files and their textures, Gerber PCB designs, VRML worlds and TIFF images among others. Depending on the platform you are running you can view more than web URLs. On iOS and Android you can view files uploaded to the device or files sent via email.
On a desktop browser you can view local files from your hard drive.