We created 30 Days to Learn HTML & CSS because we believe everyone has the right to learn how to build wonderful things on the web.
HTTrack is a free (GPL, libre/free software) and easy-to-use offline browser utility. It allows you to download a World Wide Web site from the Internet to a local directory, building recursively all directories, getting HTML, images, and other files ...
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For people who want to make things themselves, Autodesk 123D is free 3D modeling software integrated with content and fabrication services.