The Indie Bible

This is a resource that is not only growing popular among musicians in the US, it is also commonly used by independent musicians in Europe. The Indie Bible is an annually updated publication that lists thousands of  music reviewers (including http://www.indiemusicreview.org/),  radio stations, venues, record labels, and websites, all geared towards independent musicians.  It isn't a free publication, but many musicians have found it to be a worthy investment in their careers and music.  You can find it at http://www.indiebible.com/.