Features you don't want to miss:
Exercises with various degrees of difficulty: ascending, descending, random and simultaneous intervals
NEW Selection of intervals for your exercise: all, weakest and custom
Learning progress indicator for the overview of your abilities, displaying the average of the last and all-time exercises
Get reminded of your daily exercise in order to get a steep learning-curve
Pianu - Learn to play the piano in your browser.
EarMaster - Professional software for ear training and practical music theory on Windows and Mac.
Flowkey - The easiest way to learn piano with your iPhone or iPad
Meludia - Listening exercises and to sharpen your ear and music theory skills
Playground Sessions - Online piano learning game.
LenMus - LenMus is a free program for learning music.