github.com Soundfly Alternatives

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.

Listen to your PC audio, use your phone as a mic or stream audio from your phone

freemium

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SoundWire does audio mirroring (audio cast). You can use any music player on your PC or laptop like Spotify, YouTube, or iTunes and stream low-latency live sound over WiFi directly to your Android device.

TuneBlade - Stream audio to Airport Express, Apple TV, AirPlay compatible speakers and HiFi Receivers.

AirPlay lets you stream music throughout your entire house — wirelessly.

Stream What You Hear.

Open Source

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.

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. Read more about AirParrot.

RaopX is software that is designed to stream any audio of your PC from your Apple devices by configuring both devices with their IP address.

It is an AirPlay-compatible audio receiver that are capable of receiving the audio files from the PC, iDevices, and any AirPlay compatible platforms.

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

AudioStreamer is a free web-based audio streamer which gives you easy access to your music.

Huge range of supported formats.