Rockler is the second of my two favorite places to buy woodworking tools. I visit their retail store more than any other.
They also offer free catalog. The catalog is 150 pages and offers tons of great tools. They specialize in enhancements for your power tools -- router tables, fences, jigs. The also have tons of specialty hardware.
The thing that Rockler sells that will be of greatest use to automata makers is their line of thin cut wood. They sell planed domestic and exotic woods in sizes that make sense for automata makers.