Stardock Acoustic Bridge
Acoustic Bridge gives you the power to redirect audio from one PC to the speakers of another PC.
16 Alternatives To Stardock Acoustic Bridge
AirBeamTV
Application to mirror the screen and sound of your Mac to Smart TV or Chromecast.
AirParrot
AirParrot is an interesting piece of software that allows you to view content from your Mac desktop through your television set if you have an Apple TV that can act as a bridge between the two devices.
AirServer
AirServer is a Mac and PC application that allows you to stream or mirror your Android device to your PC or Mac.
Ampache
Web ( HTTP centralized ) based audio/video streaming application
AudioRelay
Wirelessly stream all of your PC’s audio to your phone in real-time. Listen to your Music, Movies or Gaming sessions.
ClickShare
Share ideas and content securely from any device on the meeting room screen
Icecast
icecast is free server software for streaming multimedia.
Madsonic
Madsonic is a web-based media streamer and jukebox fork of https://alternativeto.
Nicecast
Nicecast makes it possible to broadcast music from any application or sound input on the Mac.
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.
Rocket Broadcaster
Broadcast live to your internet radio station (Icecast, SHOUTcast, and more).
Serendipity by Spotify
Map shows when two people play same song at same time
SpeakerShare
This is a Java application to use the speaker connected to other computer on the network.
Stream What You Hear
Stream What You Hear.
StreamToMe
Huge range of supported formats.
crowdbeamer
Crowdbeamer is a presentation system that delivers your screen content in real time to all portable devices around you, no matter where.