1)   Happy Note! Treble Clef and Bass Clef 2.52
A real computer game (Lives, Points, Bombs, etc.) that will teach you how to read music even as you play! You can choose to play in alphabetical (A, B, C... and A, H, C...) or syllabic notation (Do, Re, Mi...). 3 different speeds available.

 2)   Happy Note! Notes In Space 1.6
A full-fledged arcade-type computer game that's both fun and educational. It will teach you about relative note durations even as you play. With its 3 levels of difficulty and other options, it is suitable for players of all ages.

 3)   Happy Note! Play It By Ear 2.02
A real computer game that teaches you to recognize music notes by ear. Easy to customize, Happy Note! Play It By Ear lets you learn at your own pace. It requires no previous knowledge of music and its "Cartoons" option makes it even more fun.