My absolute favorites for design and function are the pipe nail and horseshoe nail, with a tamper on one end and a scoop/pick on the other. These cost little and do the job just fine. It's all I need in most cases, to tamp, loosen tobacco that has been tamped too much, and finally scoop everything out of the pipe after smoking. The bareness of design is inspiring. However, like most pipe smokers, I have a vulnerability for accessories, so I also have several Czech tools, one of them inherited from my grandfather and probably over a century old, and a splendid little folding pipe tool in stainless steel that I bought at a pipe show with fold-out pick and scoop. It has heft and is fun to use. But on a daily basis, I marvel at the pipe nail, it's perfection in form and function. A very different pipe smoker, a Dunhill man with an expansive collection, foggymountain, shares my admiration for the pipe nail, just so you don't think this is a quirk of the "economy minded" (cheap).