Zeya - Zeya is a media player that lets you bring your music to any computer with a web browser.
AudioRelay - Listen to your PC audio, use your phone as a mic or stream audio from your phone
YouTube Music - YouTube Music is a streaming app primarily designed for Android and iOS mobile devices. The app lets individuals search for music from their favorite artists, enjoy playlists, and access 30 million musical tracks.
Airfoil - This software is from the Rogue Amoeba company, built to run on Mac and Windows platforms. It’s an audio-based software that allows the computers sound to play over a network device. Read more about Airfoil.
Andromeda - Andromeda turns collections of mp3 and other media files into streaming web jukeboxes.
Porthole - Play all audio from your Mac through multiple AirPlay speakers at the same time. iOS 11 and macOS 10. 13 High Sierra both add multi-room AirPlay support to the operating sytem, making Porthole redundant.