DROP D
one string down · everything else unchanged
Free
HALF STEP DOWN
every string down a semitone · same shapes
Free
OPEN C
the deepest of the open tunings
Free
OPEN D
the open strings are already D major
Free
OPEN G
the open strings are already G major
Free
UKULELE CHORDS
the first twelve chords · standard tuning G C E A
Free
IMPERIAL UNITS
convert in your head · without a calculator
Free
PAPER SIZES
the A series · from A0 to A6
$1.50
SI PREFIXES
from quetta to quecto · twenty multipliers
$1.50