Swish - Insanely great window management
UltraStar Deluxe - A free and open source karaoke game inspired by the Singstar™ game, runs on Windows, Linux and macOS.
Starters - Hacker news for sports tech
Yokee - Karaoke to YouTube videos
Sporfie - Capture personal sports highlights without filming.
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!