Scale Heaven

Scale Heaven lets you generate and browse any possible scale and chord, check out chord progressions using different scales and harmonies and even compose your own chord progressions. You can create a user and save each of these and access them any time easily.

It has almost all of the musical scales ever created in history. You can use it to compose a harmony for your song, or just to make yourself some nice-sounding rhythm while practicing solo-ing on some scale.