Alfred's Essentials of Music Theory: [Win-Mac] Lessons, ear training with acoustic instruments, scored reviews, glossary and exercises.
ByEars' Ear Trainer: Interactive software contains lessons and realistic play-along exercises. For guitar and bass.
CATS: Theory and tests, over 25,000 possible questions. Covers Associated Board music theory exams, grade 5 theory.
Clarion: [Mac] Practice and be quizzed on the various intervals of the 12 tone western music octave division.
ClefCoach: For beginners, teaches the treble and bass clefs. Freeware.
Cope Media: [Win] Musical eartraining software: aural training of scales, chords, intervals, melody, rhythm, inversions and progressions.
Crystal Metronome: Accurate software metronome for Windows, includes swing timings. Demo available.
Deelakord: [Win] Card game that teaches music theory: notes, scales and chords. Order form included.
DMetro: Metronome for Windows. Learn to keep time when playing.
Dolce Ear Training: Allows the advancing music student to gain skill in identifying rhythms, intervals, and chords.
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.
Ear Training Expedition, Part 1: [Win] Helps students learn music theory and practice their ear skills with colorful, creative games.
Ear Workout: [Mac] Open source software for musical ear training.
EarBoost: Ear training software with graphical feedback to help measure your results.
EarMaster Pro: [Win] Play, improvise, compose, transcribe music by ear. Exercises in intervals, chords, scales, melodies and rhythms.
EarPower: [Win] Can be used as a daily routine, helps anyone from the "tone-deaf" person to the professional musician.
Fine Software's Metronome: [Win] A shareware metronome with any musical meter allowed, customizable sound, and ergonomic interface.
Flat 5 Software: Ear training software that covers intervals through altered dominant chords. PC, Mac.
GNU Solfege: Free ear training software, runs on Windows and most Linux/UNIX distributions. [Open Source, GPL]
Greg Jalbert's Listen: [Mac] Ear training program for students and individuals to strengthen perception of melodies and harmonies.
Happy Note!: [Win] Computer game allows people to learn how to read music while playing.
Jalmus: Free, open source music education software helps musicians, especially pianists, improve sight-reading.
Jorge Meletti's Melodic Intervals: Study ear perception of random melodic chains, based on a user chosen set of intervals. Freeware.
Lars Peters' Eartraining: [Mac] Practice intervals, chords, scales and perfect pitch. Shareware.
Magic Ear Trainer: [Win] Improve your musical ear.
Metronimo: [Win] Study music theory, discover classical composers, test your musical culture, recognize instruments, with this game. Also in French.
MuseBook Metronome: Trace the tempo of the music you are listening to.
Musemath: Flash animated site uses the guitar to demonstrate some of the science behind western traditional music.
Music Study: [Win-Mac] Ear training and music theory instruction software, by Dr. Gilbert Trythall.
Musica Analytica: [Mac] Covers music theory fundamentals to part writing and voice leading treatment. Includes help and class management.
MusicGoals by Eye & Ear: [Win] Ear training, sight reading, and music theory - combined approach for piano, guitar and string instruments.
Musicianship Basics: [Win-Mac] For schools and piano teachers. Graded ear training and theory activities. Demos available.
Note Chaser: [Win] Music transcription assistant helps anyone to transcribe a CD track by frequency display and slowdown.
PBJ Music - Computer Activities: [Win-Mac] Games disguise the drill and practice of elementary through intermediate music theory concepts.
Perfect Pitch via Brainwave Synchronization: Listen to PowerPoint files created with Brainwave Synchronization encoding.
RhythmTutor: [Win-Mac] Music instruction software: learn to sight-read musical rhythm notation. Demo available.
Rick Bales' Music Trainer: Recognize chords, scales, intervals, doublestops, cadences, single notes.
Rising Software: Offers Auralia, an ear training program for Win and Mac and Musition, a theory training program for Win.
Scala: Experiment with musical tunings: equal and historical temperaments, just intonation, microtonal and non-Western scales. Win, Linux, OSX.
Tete Open Source Ear Trainer: Recognise the relationships between notes of different pitches. Play and be tested on intervals, chords, and scales.
The Harmonic Metronome: [Win] Produces scales and arpeggios, perfectly tuned and perfectly timed. Demo available.
Treblis Software Corp: Music theory and appreciation software for intermediate, high school, and college level students and their instructors.