Audile is an open-source music recognition application that can help you quickly and accurately identify a music track playing near you. The app integrates AudD, ACRCloud, and Shazam for song identification, and uses Odesli to retrieve platform-specific track links.
ChordReader 2 is an enhanced version of ChordReader, developed by Nolan Lawson. It's intended to keep compatibility to old devices, as old tablets still serves well as book of music. ;)
Controlling iTunes and Spotify volume using volume up and volume down hotkeys.
