The following is a list of tools for musicians. Most of them are still beta editions.
Harmonica / harp
Harps And Chords >>
A small tool for harmonicaplayer which helps you find the right harmonica for the chords of the song you are playing, and shows you where the notes of each chord are located on the different harps.
Guitar
Fretboard memorizer >>
Knowing the notes on the fretboard of a guitar makes your life as an guitarist much easier. This little tools help you train that skill.
Bass
Fretboard memorizer >>
Knowing the notes on the fretboard of the bass is a important skill for a bassplayer. This little tools help you train that skill.
Mandolin
Fretboard memorizer >>
Knowing the notes on the fretboard of the mandolin is a important skill for a bassplayer. This little tools help you train that skill.
Ear traning
Rythm