Phoon displays the phase of the moon, either currently or at a specified date / time. Unlike other such programs, which just tell you how long since first quarter or something like that, phoon shows you the phase with a cute little picture. You can vary the size of the picture with the -l flag, but only some sizes have pictures defined - other sizes use @'s.
Sample output (HTMLized via texttohtml):
-. . . -. \ \. \ \ @| \ New Moon + | 1 3:16:48 | First Quarter - | 5 13:51:02 / | / / /' / -' ' ' -'
See also: bigcal, globe, xphoon.
ACME Labs / Software / phoon