Chordify - Chordify turns any music or song (YouTube, Deezer, SoundCloud, MP3) into chords.
Yousician - An interactive guitar-learning app.
ChordU - Extracts chords from any song, integrated YouTube.
Guitarix - Guitarix is a simple Linux Rock Guitar Amplifier for https://alternativeto.
Transcribe - An online app that reduces the pain of converting audio & video to text. Saves thousands of hours every month for journalists, lawyers, students and professional transcriptionists all over the world, including researchers in Antarctica.
Chordbase Lite - Chordbase Lite is a paperless solution for the gigging musicians to display lyrics and chords on mobile devices.