POKERS & TAMPERS
Aside from the ubiquitous pipe cleaner, these are the requisite instruments for proper pipe smoking:

Poker
A pipe poker is a slender piece of metal that can be used to aerate and loosen tobacco, as well as used to clear the airhole.

Tamper
A tamper is a flat metal surface used to pack, or tamp, the tobacco in the bowl.

Scraper
The third, rarely used, pipe tool is the scraper.  It is a beveled, not sharp, spoon-like, metal instrument that can be used to remove excess char from the inside of the chamber.  It has the potential to damage the cake and for that reason scrapers are rarely used; instead many pipe smokers prefer to use a reamer (see reamer section).