AudioRelay - Listen to your PC audio, use your phone as a mic or stream audio from your phone
AIMP - AIMP : Free Audio Player : Официальный сайт программы
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.
VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
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.
MusicZen - mp3 file organizer