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 `.-./ Last Quarter + | @@@@ --`-' 1 16:25:09 |@ @@@ ` New Moon - | @@ @ 5 2:35:26 \ . @ @@ | @@ @@@ \ @@@@ @\@ \ o @@ \ `\ . .\ \ ` `-. o / `-. / `--. `-----See also: globe.