Noisli - Noisli is a fantastic background noise and color generator for working and relaxing. Online soothing ambient sounds like White noise, Rain and Coffee Shop.

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

Noizio - Feeling that the noise of the big city is too much for you to bear?

muted.io - A magical collection of interactive music theory tools & visual reference pages for musicians and music producers

Moodwill - Create and listen for free to your perfect nature sounds environment with music to help you concentrate, relax, sleep and overall feel better.

7Pad Scales and chords - Music instrument and assistant for playing scales and chords.