This isn’t a tool per se, but it will help you use the ones you already have. If you haven’t wandered over to the Miller Welding website recently, you might not have found their great “welding library.” It’s a compendium of tips ranging from the obvious buyer’s guide to some incredibly useful descriptions of techniques.
For the professional welder, they also discuss some of the economic issues involved, including how to keep your costs down and make the most of the tools you’ve got.
If nothing else, this site is worth a bookmark solely for their “Welding Dictionary,” which serves as a great reference when you’re reading other texts. Best of all: It’s free.
Welding Library [Miller]