A Cappella Almanac Official site of CASA, the Contemporary A Cappella Society of America, a worldwide clearinghouse for all-vocal music. News, events, groups, albums, tips and advice, reviews, classifieds, web directory, and library of available song arrangements. http://www.casa.org/

RARB - Recorded A Cappella Review Board Independent reviewers rate recent CDs according to criteria such as tuning, blend, production quality and soloists. Submissions. http://www.rarb.org/

A Cap(p)ella Jeanine Rondas's site offers news, information, reviews, artist details, commentary and links as well as a home for CASA of Belgium and the Netherlands. In English and Dutch. http://home2.planetinternet.be/jrondas/E_a_capella_startpage.htm

The Beginning All-vocal hip-hop CD from artist Sane CHUK Cristianwits includes rap covers and Christian originals. http://sanechuk.tripod.com/scc.html

Primarily A Cappella Radio Web-based streaming RealPlayer radio featuring a variety of programs playing different styles of a cappella music. http://www.singers.com/radio/

Perfect Voice A systematic and scientificially proven method for developing the vocal organ. http://www.perfect-voice.com/