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University of Houston
University of Houston: Engines of Our Ingenuity: Fulton's Submarine
Discusses the technological and political conditions which led to Robert Fulton's invention and development of the submarine. Includes some biographical information and some graphics of early submarine sketches. (Text is the actual radio...
Khan Academy
Khan Academy: What Are 3 D Shapes?
This Khan article explains how to write your own 3D graphics engine with some trigonometry!
Other
Build Web Site4u: How to Build a Website
BuildWebSite4u.com offers an overview, advice, tools, and many other useful resources for building a website.