Piano input devices
Midi controller
Mouse
Mouse can be used in 3 modes:
Single-mode: One key can play at a time. Press and hold your left mouse button to effect the duration of the sound.
Chord-mode: Press and hold the keyboard 'Ctrl/Cmd' button while selecting multiple keys with your mouse. Press 'Esc' to cancel selection.
Drag-mode: Press and hold the keyboard 'Alt' button while moving your mouse over the keyboard.
Vocal range test 
Virtual Piano Keyboard & Recorder 
Vocal warmup tool 
Interactive Circle of Fifths 
Sight singing trainer 
Perfect Pitch Test 
Chord player 
Music Scales Tool 
Chord Progression Generator