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 `.-./ . @ Full Moon +
| @@@@ --`-' o 6 1:55:54
|@ @@@ ` o Last Quarter -
| @@ @ .-. 0 15:16:29
\ . @ @@@ `-'
| @@ @@@@@ .
\ @@@@ @\@@ / .
\ o @@ \ \ /
`\ . .\.-.___
\ `-'
`-. o / | o
`-. / .
`--. .
`-------
See also: bigcal, globe, xphoon.
ACME Labs / Software / phoon