ChordU - Extracts chords from any song, integrated YouTube.
Neuratron AudioScore - Polyphonic Music Recognition Software. Neuratron AudioScore Ultimate music transcription software.
Guitaa.com - Turn ANY song into chords, play along with interactive chords and diagram, transpose, loop, tempo control.
Audiveris - Audiveris is an open-source Optical Music Recognition software which processes the image of a music...
Chordify - Chordify turns any music or song (YouTube, Deezer, SoundCloud, MP3) into chords.
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.