Guitartuner The Noisegames Guitartuner is a "tune by ear" tuner.
Next to the standard tuning it offers 7 popular open tunings.
Test the Guitartuner here.
bpm-finder The noisegames bpm-finder is a free tool to find out how many
beats per minute (bpm) a particular piece of music or rhythm has got. Simply click on the red button along some music and you'll find out.