Clyp - Clyp is the easiest way to record, upload and share audio. No account required.
Defonic - Create a unique sound environment at home or in the office
Noizio - Feeling that the noise of the big city is too much for you to bear?
Focus: Ambient Sound Widget - Escape distractions with nature soundscapes
Noizer - Ambient sounds like Noisli, but free
Nugget - Find your perfect startup idea