Kermit - The most powerfull search system. Very simple interface. FTP search only.

Palavista - Digital Music Metacrawler, meta-search system. Requires several search engines.

Lycos MP3 Search - Very fast MP3 section of Lycos. Good search.

AudioGalaxy - In addition to MP3 search it has a lot of MP3 links.

MediaTrak - Its convenient search engine has an easy and simple interface.

AudioFind - It's a very good search system. Search by categories: Singer, Name and more...

MP3 Box - It's one of the oldest search engines. In addition provides music news and MP3 links.

Scour.net Media Search - Good interface, very relevant search.

MP3meta - New MP3 meta-search system.

Playdude - Good MP3 search.

2Look4 - Exact search, attractive interface, popular MP3 records.

Musicseek - The new professional MP3 search system.