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):
.------
.--' o
.-' . O
.-'@ @@@@@@@
/@@@ @@@@@@@@@@@
./ o @@@@@@@@@@@
/@@ o @@@@@@@@@@@.
/@@@@ . @@@@@@@o
|@@@@@ .
/@@@@@ O `.-./ . Last Quarter +
| @@@@ --`-' 0 7:37:54
|@ @@@ ` o New Moon -
| @@ @ 7 10:33:32
\ . @ @@@ `
| @@ @@@@@ .
\ @@@@ @\@@ /
\ o @@ \ \ /
`\ . .\.-.___
\ `-'
`-. o / |
`-. / .
`--.
`------
See also: bigcal, globe, xphoon.
ACME Labs / Software / phoon