• Motorola
• MC68HC11A8 Quick Reference Manual
• HC11 Intro from the EE compendium
• Robot cafe
• LEGO Mindstorms
• Laboratory for Active Materials and Smart Structures
• All About Words
• Binari-to-hex
• Microcontroller
• Resistor Color Code Calculator
• All Electronics Corporations
• PCB Design: Protel International
• PCB Techniques
• http://www.cibs.co.uk/etch/x7.html
• http://www.fullnet.com/u/tomg/gooteepc.htm
•  Good selection of small motors, solenoids, etc, plus electronic parts

• http://www.jameco.com

• Mechanical parts, including gears, pulleys, belts, etc

• http://www.sdi-si.com/index.asp

• Electrical parts, motors, etc

• http://mouser.com

• http://mpja.com

Please let us know if you know other interesting websites to add here.