The Strapworks: Webbing and related hardware

McMaster-Carr: Elastic tubing as well as 10,000 other items

Harvel : PVC and plastic tubing, size charts

Fitness-Equipment: Parts for home gyms

This to That: A gluing guide

American Science & Surplus: Lotsa gizmos at cheap prices

On Line Metals: Bending stock, making your own bars, or any other small metal stock orders

Smooth-On: All kinds of plastic resins and liquid rubber

Thomasnet: This is the on-line Thomas Register providing links to manufacturers throughout the United States and Canada. You can find everything under the sun here!

Modular Pipe & Rail Fittings : Fittings that can put steel pipes together the way elbows, tees, etc. can't!

Measurments Conversion Calculator : This outstanding on line calculator converts anything to anything.

Knots: Knowing which knots to use for various functions is a useful tool for the home fitness builder. The slip knot, in particular, is a stalwart knot for a lot of uses. Good web sites describing knots are too many to list. Just do a search for "knots".

Mountaineering or Outdoor Retailers in your area are great sources for quality webbing, rope, and related hardware