Jocsoft makes some software products used for searching the web, and one of those is designed to search for MP3 files. As a result, they decided to include a nice page of MP3 links for developers on their web page. It’s a little dated, with a high ratio of dead links, but still worth a look if you’re an MP3 afficionado.

http://www.jocsoft.com/vvmp3/mp3dep.htm