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 7 6:32:44
|@ @@@ ` o Last Quarter -
| @@ @ .-. 0 14:02:32
\ . @ @@@ `-'
| @@ @@@@@ .
\ @@@@ @\@@ / .
\ o @@ \ \ /
`\ . .\.-.___
\ `-'
`-. o / | o
`-. / .
`--. .
`-------
See also: bigcal, globe, xphoon.
ACME Labs / Software / phoon