Materials

Books

Lindsay Technical Books

Manning

O'Reilly

Packt Pubs

Misc, everything

Aircraft Spruce - metal, tubing, and aircraft stuff too

McMaster-Carr

Small Parts (no really! that's their name!)

Plastics

Fibreglast composites, carbon fibre, kevlar, fibreglass

Polytek Plastics lots of moldmaking stuff

Tools

Micro-Mark

See also

Electronics