Ear Training Expedition, Part 1
[Win] Helps students learn music theory and practice their ear skills with colorful, creative games.
http://www.trailcreeksystems.com/

EarMaster Pro
[Win] Play, improvise, compose, transcribe music by ear. Exercises in intervals, chords, scales, melodies and rhythms.
http://www.earmaster.com/

Music Study
[Win-Mac] Ear training and music theory instruction software, by Dr. Gilbert Trythall.
http://www.musicstudy.com/

Cope Media
[Win] Musical eartraining software: aural training of scales, chords, intervals, melody, rhythm, inversions and progressions.
http://www.cope.dk/

PBJ Music - Computer Activities
[Win-Mac] Games disguise the drill and practice of elementary through intermediate music theory concepts.
http://www.pbjmusic.com/activities.html

RhythmTutor
[Win-Mac] Music instruction software: learn to sight-read musical rhythm notation. Demo available.
http://members.aol.com/CopperSoft/rhythm.html

Metronimo
[Win] Study music theory, discover classical composers, test your musical culture, recognize instruments, with this game. Also in French.
http://www.metronimo.com/

Happy Note!
[Win] Computer game allows people to learn how to read music while playing.
http://www.happynote.com/music/learn.html

Rising Software
Offers Auralia, an ear training program for Win and Mac and Musition, a theory training program for Win.
http://www.risingsoftware.com/

The Harmonic Metronome
[Win] Produces scales and arpeggios, perfectly tuned and perfectly timed. Demo available.
http://www.wholarts.com/music/hm/

MusicGoals by Eye & Ear
[Win] Ear training, sight reading, and music theory - combined approach for piano, guitar and string instruments.
http://www.musicgoals.com/

Treblis Software Corp
Music theory and appreciation software for intermediate, high school, and college level students and their instructors.
http://www.treblis.com/

Greg Jalbert's Listen
[Mac] Ear training program for students and individuals to strengthen perception of melodies and harmonies.
http://www.edly.com/listen.html

Dolphin Don's
[Win - Mac] Games for ages 6 to adult teach ear training and reading by identifying notes, rhythms, key sigs, intervals and chords.
http://dolphindon.com/

Deelakord
[Win] Card game that teaches music theory: notes, scales and chords. Order form included.
http://homepage.eircom.net/~deelakord/

ByEars' Ear Trainer
Interactive software contains lessons and realistic play-along exercises. For guitar and bass.
http://www.byear.com/

DMetro
Metronome for Windows. Learn to keep time when playing.
http://www.red-field.com/enqsoft/

Lars Peters' Eartraining
[Mac] Practice intervals, chords, scales and perfect pitch. Shareware.
http://www.lpeters.de/

Ear Workout
[Mac] Open source software for musical ear training.
http://www.lightandmatter.com/ear_workout/ear_workout.html

Scala
Experiment with musical tunings: equal and historical temperaments, just intonation, microtonal and non-Western scales. Win, Linux, OSX.
http://www.xs4all.nl/~huygensf/scala/

MuseBook Metronome
Trace the tempo of the music you are listening to.
http://www.musebook.com/

Perfect Pitch via Brainwave Synchronization
Listen to PowerPoint files created with Brainwave Synchronization encoding.
http://www.geocities.com/jeremygreene70/

Dolce Ear Training
Allows the advancing music student to gain skill in identifying rhythms, intervals, and chords.
http://fastrabbitsoftware.com/eartraining.htm

Musemath
Flash animated site uses the guitar to demonstrate some of the science behind western traditional music.
http://www.musemath.com

GNU Solfege
Free ear training software, runs on Windows and most Linux/UNIX distributions. [Open Source, GPL]
http://www.solfege.org/

Note Chaser
[Win] Music transcription assistant helps anyone to transcribe a CD track by frequency display and slowdown.
http://www.tnsoptima.com/soundidea/notechaser.html

ClefCoach
For beginners, teaches the treble and bass clefs. Freeware.
http://www.clefcoach.com

Crystal Metronome
Accurate software metronome for Windows, includes swing timings. Demo available.
http://www.milsoftware.com/crystalmetronome/

Tete Open Source Ear Trainer
Recognise the relationships between notes of different pitches. Play and be tested on intervals, chords, and scales.
http://sourceforge.net/projects/tete

Magic Ear Trainer
[Win] Improve your musical ear.
http://www.lovemusiclovedance.com/ear.htm

Flat 5 Software
Ear training software that covers intervals through altered dominant chords. PC, Mac.
http://flat5software.com/

CATS
Theory and tests, over 25,000 possible questions. Covers Associated Board music theory exams, grade 5 theory.
http://www.takenotepublishing.co.uk/tnpl/cats/

EarBoost
Ear training software with graphical feedback to help measure your results.
http://www.earboost.com/

Jorge Meletti's Melodic Intervals
Study ear perception of random melodic chains, based on a user chosen set of intervals. Freeware.
http://br.geocities.com/softwaremusical/english.html

Fine Software's Metronome
[Win] A shareware metronome with any musical meter allowed, customizable sound, and ergonomic interface.
http://www.finemetronome.com

Jalmus
Free, open source music education software helps musicians, especially pianists, improve sight-reading.
http://www.jalmus.net

Clarion
[Mac] Practice and be quizzed on the various intervals of the 12 tone western music octave division.
http://www.red-sweater.com/clarion/