Sweet Adelines International: www.sweetadelineintl.org The official site for the wordwide organization of women singers "dedicated to advancing the musical art form of barbershop harmony through education and performance."
Barbershop Harmony Society: www.barbershop.org Men's international barbershop organization
Harmony Incorporated: www.harmonyinc.org/ Official site of "the international organization of women barbershop singers dedicated to the performance, promotion and preservation of four-part a cappella harmony in the barbershop style."
SING Sweet Adeline Yahoo Group: launch.groups.yahoo.com/group/SweetAdelinesInt/ Discussion list for members and fans of Sweet Adelines International to discuss any and all aspects of the music or the management of our choruses and quartets.
Barbershop Learning Tracks Database: barbershoptracks.com/database.html A consolidated source for available male and female barbershop arrangement learning tracks. Search by song title, arranger, voicing, etc.
Barbershop Tags: www.barbershoptags.com Vast collection of barbershop (and other a cappella) tags, including sheet music, learning tracks and videos. Anyone can upload a tag or a video
Metronome Online: www.metronomeonline.com/ Music tool with tempo selections that helps with your rhythm while practicing music.
Music Theory Lessons On-Line: www.musictheory.net/index.html Learn the basics of reading notes, time signatures, key signatures, intervals, chords, etc.
Send a Metronome Click File: www.webmetronome.com/ The Web Metronome is a free, online metronome. Adjust the tempo, number of beats, and accent beats - as well as capture your settings with a URL link that can't be sent to anyone.