Update 18

Added music player collection

README.md

@@ -29,6 +29,7 @@
 - [`Flipper-Plugin-Tutorial` Building a Custom "Hello world" plugin.](https://github.com/DroomOne/Flipper-Plugin-Tutorial)
 - [`floopper-bloopper` LD#47 Game.](https://github.com/glitchcore/floopper-bloopper)
 - [`Spectrum analyzer` Sub-GHz frequency spectrum analyzer.](https://github.com/jolcese/flipperzero-firmware/tree/spectrum/applications/spectrum_analyzer)
+- [`FlipperMusicRTTTL` Collection of musics for FlipperZero Music Player.](https://github.com/neverfa11ing/FlipperMusicRTTTL)
 
 ## Firmwares & Tweaks