Raw Material

• McMaster Carr
• Speedy Metals
  
• Extruded Aluminum
• Cardboard Tubes
• Wood World - in Chicago

Mechanical Components

• Free Components from IGUS!!
• McMaster Carr
• MSC
• Extruded Aluminum
• Berg: Drive Train Parts
• Bosch-Rexroth: Aluminum extrusion, linear motion assemblies
• THK slides
• MISUMI:Mechanical parts
• Small pneumatic tires
• Small Drive Products

PCB Prototyping

• Express PCB Comes with its own free software.
• PCB Express

Electrical Components

• Allied Electronics
• Digikey
• Jameco
• Mouser
• Newark

Random Fun Stuff

• American Science & Surplus (The store is in Chicago)
• Goldmine Electronics
• Freeman Supply
• Surplus Center
• Craig's List
• Parallax Robotics & Sensors Shop
• Jameco Robotics Shop

Glue

• A great website that tells you what glue to use for a variety of materials