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RubiksTrainer is a site for learning to solve the Rubik's Cube, with practice solutions, algorithms, a solver, formula, timer and speedcubing material. It covers beginner and advanced sections, 3x3 algorithms, recognition practice, OLL, PLL, COLL, a timer, and a scrambler for Cross and F2L practice. The site notes a forthcoming move to another address.
Animated Knots by Grog is a site for learning how to tie knots, with animated step-by-step demonstrations. It covers categories including boating, fishing and climbing knots, neckties, and surgical knots, and offers a Knot of the Day and basic knot guidance.
Shroomery is an educational resource for documentaries, courses, books, reference material, or self-learning.
AA9PW is an amateur radio practice site built and maintained by Simon Twigger. It offers tools to practice for US amateur radio license exams and to learn and practice Morse Code online or through the Ham Morse iPhone app. The site dates back to 1996 and added POTA CW exchanges to its Morse Code Generator.
Chord Player is a free browser-based chord progression app from OneMotion. It offers common chords and styles, a scale and key selection, chord voicing and playback options, and export to MIDI or WAV.
PlayGO is a browser-based Go game site that requires no membership registration or software installation. It includes a summary of Go rules, an introduction to the game and material on learning to play.
