Always works very reliable . best playlist out there very simple to use
KaraFun - KaraFun is the best online karaoke. Over 35,000 karaoke songs, with studio quality, at home or on the go. Regular updates. Free demo!
Musico - A game-based digital play-along practice platform 🎶
Soundfont Midi Player - Full-featured MIDI and Karaoke player/router with built-in MIDI synth
7Pad Scales and chords - Music instrument and assistant for playing scales and chords.
UltraStar Deluxe - A free and open source karaoke game inspired by the Singstar™ game, runs on Windows, Linux and macOS.
lightnote - An interactive site to learn the basics of music theory 🎶