This site has over 900 freely-downloadable barbershop tags mostly in the barbershop style with audio and/or video recordings of the tags by different singers.
Good Ear – Interactive Ear Training on the Net
Test your skill at identifying intervals, chords, scales, and the like from beginner to advanced using this interactive web site.
This site is intended to teach you to sight-sing, or to improve your sight-singing ability.
Sheet music that comes to life! A Library of digital sheet music on the web.
An online metronome ideal for easy use while practicing music.
NoteWorthy Composer – Music Notation Software
NoteWorthy Composer authoring tool is a software music composition and notation program which allows you to create, record, edit, print and play back your own musical scores.
noteableblend.org 