- LibreTexts Music: Music Learning
- AudioZ: Audio Courses / Forum
- Helio / GitHub or NoteHeads: Music Composition Tools
- MusicKit, Tuner or Tone Generator: Metronome, Tuner & Tone Generators
- Tuner Ninja: Instrument Tuner
- Circle of Fifths: Visualize Notes, Cords and Keys
- ScoreCloud, ChordReader2 or Chordify: Chord Detection / Transcriber
- Arpeggiator, Chordi or AutoChords: Chord Progression Generators
- HookTheory: Chord Progression Library
- Piano Scribe: Piano Transcriber
- LilyPond: Music Engraving Program
- Learning Music or Musicca: Music-Making Lessons
- Midiano / Discord, Piano Trainer / GitHub, Chord Nebula, sightread or PianoCheetah: Piano Practice / Learning
- Keyboard Connect: Keyboard Tutoring App
- TrueToneGuitar, Songsterr / Downloader, FAChords or ChordBook: Guitar Tools
- FretFlip, Oolimo, StringScales, My Fretboard Trainer, QFGM or GuitarScale: Learn Guitar Scales / Chords
- JamStart: Spotify Chord Charts
- #fretflip: Create / Print Guitar Scales & Chord Charts
- JustinGuitar or Guitarsix: Guitar Lessons
- Ultimate Guitar: Guitar Tabs
- Chorder: Guitar Chord Finder
- Guitar Fretboard, Fretastic or Gitori: Virtual Fretboards / Guitar Lessons
- coop3rdrumm3r or FreeDrumLessons: Drum Lessons
- 911tabs or Finger Tabs: Tabs
- Jazz Improvisor: Improvised Jazz
- LearningSynths: Synthesizers
- Sight Singing Factory: Sight Singing Practice
- A-Complete-UTAU-Tutorial-For-Beginners: UTAU Tutorial
- PerfectPitch: Pitch Recognition Practice
- MusicStaff: Music Teacher Search
- ChiffAndFipple: Irish Traditional Music Forum
- MIMO: Musical Instrument Database
- VGM Sound Sources: VGM Sound Sources / Discord