Sample Focus - The easiest way to find the perfect audio sample
Bandlab - Capture, nurture, and collaborate on song ideas in the cloud
Premiumbeat - Premiumbeat.com provides high quality Royalty Free Music.
Turntable.fm - Turntable.fm is a social media website developed by Billy Chasen and Seth Goldstein that allows the audience to stream their own music.
Epidemic Sound - Website with licensed music to use in youtube videos
Kompoz - Kompoz is an online platform for crowd-sourcing music creation, making you record, create or publish music with the guidelines of a world-class musical expert.