Sample Focus - The easiest way to find the perfect audio sample
sup - The first creep-free way to see nearby friends
UseMySound - Free music for videos, ads, games & podcasts. Every week.
Shhh Noise - A free sound generator designed to increase focus and relaxation.
FindSounds - Audio web search engine
soundrop - Soundrop is an app that allows you to create your own personalized sound track to keep you focused or relax.