Link

Standard and Specification:

• ASTM Standard for Geotechnical Engineering: http://www.astm.org/Standards/geotechnical-engineering-standards.html
• American Institute of Steel Construction (AISC): https://www.aisc.org/ 

Engineering Tools:

• GeoGebra: How about Geometry! (http://www.geogebra.org/)
• Unit Convert by Josh: Excellent, Neat, and Useful tool for Engineers (http://joshmadison.com/convert-for-windows/)
• MATLAB: http://www.mathworks.com/index.html?nocookie=true
• Mathematica: http://www.wolfram.com/
• Mathcad: http://www.ptc.com/products/mathcad/
• National Instruments: LabView, DAQ, etc (http://www.ni.com/)
• Scilab: Free Matlab replacement (http://www.scilab.org/)

Fun:

• Khan Academy: For our children (http://www.khanacademy.org/)
• Levitation?: Cool Japanese Photo Site (http://yowayowacamera.com/)
• Numbers: (http://www.numberphile.com/)