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.

13 Alternatives To Porthole

AirBeamTV

Application to mirror the screen and sound of your Mac to Smart TV or Chromecast.
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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.

AudioRelay

Wirelessly stream all of your PC’s audio to your phone in real-time. Listen to your Music, Movies or Gaming sessions.

Beamer

Matriculación/Enrollment. Beamer Single Plan · for Student Achievement. Hard copies available at the front office upon request / Copia impresa disponible en la oficina al pedir .
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Deezer

Deezer is a music streaming app created in France. It is available in 180 counties and gets 16 million users a month. 6 million of the users have paid subscriptions. Read more about Deezer.

Gnomecast

Chromecast local files from Linux - supports MKV, subtitles and 4K!

Rocket Broadcaster

Broadcast live to your internet radio station (Icecast, SHOUTcast, and more).
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Stardock Acoustic Bridge

Acoustic Bridge gives you the power to redirect audio from one PC to the speakers of another PC.
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Stream What You Hear

Stream What You Hear.
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StreamToMe

Huge range of supported formats.
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TeamViewer

TeamViewer lets you establish a connection to any PC or server within just a few seconds.

Wondershare MirrorGo

Wondershare MirrorGo is a useful tool that could mirror your android phone screen to the computer.