justinguitar.com
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JustinGuitar is a comprehensive online guitar-learning hub offering free video lessons for beginners and beyond. It covers chords, rhythm, technique, scales, and theory, with structured courses and a library of songs.
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TonalEnergy Tuner & Metronome
Low-cost mobile app combining a chromatic tuner, metronome, tone generator and practice recorder, widely used by instrumentalists and singers. Its sustained reference pitches, intonation analysis and subdivided click tracks help musicians train pitch accuracy and steady rhythm during daily practice.
Modacity
The best practice organisation app: timer, recorder, metronome, drone generator, and deliberate practice guidance grounded in cognitive science. Created by a former Hong Kong Philharmonic horn player. ~£7–10/month.
The Musician's Way by Gerald Klickstein
Klickstein turns deliberate-practice research into concrete routines for musicians: structuring practice sessions, working out interpretation, memorising securely, preparing for performance, managing stage anxiety, and avoiding the injuries that end playing careers.
musictheory.net
Musictheory.net is a free, interactive platform for learning music theory, offering concise lessons on intervals, chords, scales, rhythm, and notation. It also provides hands-on practice with ear training and theory tools to test and reinforce your understanding.
teoria.com
Teoria is an online music theory resource offering interactive lessons, ear-training exercises, and reference materials on scales, intervals, chords, rhythm, and harmony, with musical examples and analyses.
The Bulletproof Musician
Juilliard-trained performance psychologist Noa Kageyama's blog and podcast applying research from sport and cognitive psychology to music. Articles cover effective practice, managing stage fright, focus under pressure and audition preparation, helping performers practise efficiently and play their best when it counts.