web-midi-events : Print Web MIDI events in the browser, for learning, debugging, etc...
youtube-playlist-editor : Crude little web application to view and edit YouTube playlists
patch-librarian : Simple web application to manage patches stored in MIDI sysex files and send them to any connected MIDI port.
music-calculators : Calculate interval and semitones between two notes, and many other useful values.
midi-file-tools : Command line tools to work with MIDI files