• HowStuffWorks
  Learn how Everything Works! HowStuffWorks, a wholly owned subsidiary of Discovery Communications, is the award-winning source of credible, unbiased, and easy-to-understand explanations of how the world actually works. Founded by North Carolina State University Professor Marshall Brain in 1998, the site is now an online resource for millions of people of all ages.
  HowStuffWorks explains thousands of topics, from engines to lock-picking to ESP, with video and illustrations so you can learn how everything works.
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  in Web_Resources with energy sciences technology tools by 294 users
• Zotero
  Zotero is a free, easy-to-use Firefox extension to help you collect, manage, and cite your research sources.
  in WebTools with firefox tools by 41 users
• Harbor Freight Tools
  Quality Tools at the Lowest Prices
  Harbor Freight Tools is America’s leading discount tool store, selling quality power, hand and air tools at ridiculously low prices.
  discount hardware online store stores tool tools
  in Web_Resources > Tucson with tools by 17 users

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