Airfoil - 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.
Emit - Emit can stream from a Windows/Mac/Linux machine to an android/iOS device.
AirPlay - AirPlay lets you stream music throughout your entire house — wirelessly.
VPlayer - VPlayer - a free music player for VKontakte.
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. Read more about AirParrot.
Vinyl Music Player - A fork of Phonograph Music Player that "makes all Pro features free, as they used to be".