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.