Scale Heaven - Browse and play any scale/chord, chord progression.

keezy - A colorful soundboard. Play with music.

ChordIQ - Learn notes, chords, sight reading, perfect pitch and more.

Figure - Propellerhead creates world-class software products and services that inspire music makers and provide the foundation for a worldwide creative musical community.

Scales-Chords - Free online music tools featuring a searchable chord database and chord charts.

Splice - Music creation, collaboration, and sharing made simple.