Their description of the site
"Soungle is a free site, developed by Southern Codes, for finding all kind of sound FX and musical instruments samples on our mega online library. As different from most of similar sites, Soungle is NOT a Web search engine. It only searches in our growing monster database. Our goals are to keep it simple to use (search, preview and download) and to keep it free.
Keyword searches are performed by entering any word or phrase in a search box. The retrieved results of a keyword search are displayed ten to a page. Clicking on play icon allows you to preview a file. Download button instantly downloads the sound effect or musical instrument sample file. A short description of the sound appears on top of every sound , followed by the frame rate, duration and bit rate. Remember, all of our sound effects and samples are royalty free for downloading"
Im really digging the plain and simple interface :)