Muted.io offers a free, magical collection of interactive music theory tools designed for learners of all levels. Explore virtual pianos, tuners, chord and scale explorers, the circle of fifths, beat makers, interval trainers, and more. Its engaging, visual interface makes mastering music fundamentals enjoyable and accessible for everyone.

4four.io is a fun, browser-based rhythm training platform packed with games like Rhythm Bingo, Tempo Tap, and Rhythm Dice. Perfect for students and teachers, it builds timing, reading, and coordination skills through interactive play. Free, engaging, and effective—it makes mastering rhythm exciting for all ages and skill levels.