autodesk Freewheel

Project Freewheel allows you to view design data without installing additional software. All you need is a browser. The Project Freewheel service is both a Web site where you can type in an URL to your own design data for interactive viewing, and a Web service that allows you to embed an interactive viewer of your own design data in your own HTML pages. Today it provides technology to view your DWF™ files on a Mac® computer, a PDA, a Cell Phone, on a Windows® or Linux® platform, or in Microsoft® Internet Explorer®, or Firefox® browsers.Project Freewheel also provides technology to embed your own DWF file in your own web page (HTML) that visitors can view without installing any software.

more info : http://labs.autodesk.com/technologies/freewheel/
to try it : http://www.dwfit.com/index.aspx