AudioRetoucher - AudioRetoucher is a tool for analyzing music, changing tempo and pitch in real time
Padlet - Visual boards for organizing anything.
Chordify - Chordify turns any music or song (YouTube, Deezer, SoundCloud, MP3) into chords.
BookWidgets - BookWidgets is an excellent application that let you create engaging exercises in minutes and easily share a varied variety of beautiful and fun activities with your classroom and others.
Guitaa.com - Turn ANY song into chords, play along with interactive chords and diagram, transpose, loop, tempo control.
Quizlet - Quizlet allows you to review and create flashcards for a variety of subjects, such as math and reading.