AudioRelay - Listen to your PC audio, use your phone as a mic or stream audio from your phone
Jukebox - Collaborative music player
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.
Juicebox - Spectacular HTML5 Image Galleries Made Easy
AudioStreamer - AudioStreamer is a free web-based audio streamer which gives you easy access to your music.
ShareTube - Watch YouTube, synced with friends.