Added link for shairport-sync.

Shairport-sync is the reverse engineering of AirPlay and AirPlay 2 for Linux and FreeBSD systems.

README.md

@@ -1198,6 +1198,7 @@ _See also: [List of streaming media systems - Wikipedia](https://en.wikipedia.or
 - [Navidrome Music Server](https://www.navidrome.org) - Modern Music Server and Streamer, compatible with Subsonic/Airsonic. ([Demo](https://www.navidrome.org/demo), [Source Code](https://github.com/navidrome/navidrome), [Clients](https://www.navidrome.org/docs/overview/#apps)) `GPL-3.0` `Docker/Go`
 - [Polaris](https://github.com/agersant/polaris) - Music browsing and streaming application optimized for large music collections, ease of use and high performance. `MIT` `Rust`
 - [Raveberry](https://github.com/raveberry/raveberry) - A multi-user music server with a focus on participation. ([Demo](https://demo.raveberry.party/)) `LGPL-3.0` `Python`
+- [shairport-sync](https://github.com/mikebrady/shairport-sync) - AirPlay and AirPlay 2 audio player `View license file` `C`
 - [Snapcast](https://github.com/badaix/snapcast) - Synchronous multiroom audio server. `GPL-3.0` `C++`
 - [Stretto](https://github.com/benkaiser/stretto) - Music player with Youtube/Soundcloud import and iTunes/Spotify discovery. ([Demo](https://next.kaiserapps.com), [Clients](https://github.com/benkaiser/stretto-mobile-next)) `MIT` `Nodejs`
 - [Supysonic](https://github.com/spl0k/supysonic) - Python implementation of the Subsonic server API. `AGPL-3.0` `Python`