So it is a search engine for sounds.
Here is the website-
http://www.findsounds.com/ISAPI/search.dll
But there is also an application but it costs money and it does not make much sense as you can as well just go to the website through your device... but it has one interesting function (that I have not tried...) and that is the possibilty to record a sound and it will try to find a similar sound. That sounds like a way to stumble across some new sounds that would not be found in other ways?