The basic construction is simple and consists of only three pieces of scrap wood, glue, a few screws and a ratchet tie down which you can get at any hardware store. You can easily build a clamp out of a few scrap pieces of wood and this clamp can be adjusted.
Build this strong wall mounted clamp rack using the free woodworking plans at the link.
Build your own c-clamps using this free step-by-step tutorial with pictures.
At the link you will find ideas for clamp storage including pipe clamps, bar clamps, kreg clamps, c-clamps, and other miscellaneous clamps.
One side has drawers, the other three sides store clamps as well as the top. And all of this is mobile. Build this rolling clamp cart using these free plans and instructions.
Here is a low or no cost solution if you are in need of spring clamps in a hurry. Follow along to see how they were made.
Build this wall-mounted swing out clamp rack using these free woodworking plans with instructions.
Build your own pipe clamp rack that will not take up too much valuable wall space in the workshop.
Follow along and build your own bar clamps using hardwood and a scrap of maple.
You can buy cam clamps but why would you when you can build your own for a fraction of the cost. Here is how to make your own cam clamps.