DWG TrueView from Autodesk is free, if that helps. Available as 64-bit aswell. http://usa.autodesk.com/adsk/servlet/pc/index?id=6703438&siteID=123112 Let's you export DWG and DWF into .png or .pdf, but installer is quiet big and requires registration. (Just use a disposable eMail if you don't want to register with your real details)