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

SoundBetter - Marketplace for musicians and music production professionals

Defonic - Create a unique sound environment at home or in the office

PrimoMusic - An iTunes alternative made to manage iPhone/iPod media files

A Soft Murmur - Ambient sounds to wash away distraction.

Gemtracks - Buy instrumental backing tracks and beats for $149! Get master ownership and copyright transferred to you once purchased.