Ricci Adam’s Musictheory.net
This site provides interactive lessons and trainers that cover basic music theory concepts. Be sure to use the Key Signature Trainer, Interval Ear Trainer, and Chord Ear Trainer.
Teoria Music Theory Web
There are many interactive exercises on this website. Most topics have various ways for you to practice: construction, identification, and ear-training.
Rhythm Trainer
An interactive rhythm site that can help work on rhythmic dictation.
Hook Theory
An interesting site that has resources to practice listening for harmonic progressions.
Dolmetsch Online
There are many interesting things to discover on this website. Theory students will find the music dictionary (under resources) to be extremely helpful in a pinch!
Blank Sheet Music
Create staff paper in a variety of formats.
Four Part Bach Chorales
Midi files and PDF scores.
Flat
Collaborative web based notation & scoring program.
Muse Score
Web based notation program.
Note Flight
Web based notation program.
Soundtrap
Web Based sequencing program
Chordify
Web based program that gets the chords for any song