The humble pencil, which author Wendell Berry uses for correspondence, saying that he no longer has the courage to write unless he can erase. (Berry long ago eschewed the computer, which does pretty well in the erasure department, sometimes when you least expect or want it to.)
The historical pencil, produced in a factory in Concord, Massachusetts, owned by the father of Henry David Thoreau.
The mechanical pencil, which is not my writing implement of choice but is a dandy tool for making notes to myself in a calendar, especially if it has a good eraser.
The pencil, in short, has much to recommend itself, and is certainly worth a post—though not, of course, a penciled one.