Partyhero - Pass your friends the aux!
YoutubeMultiDownloader - Just like its name YouTube Multi Downloader, it is an online website for downloading the videos of downloading without using any video download and accelerator.
Join My Playlist - Listen to music live together with your friends in Spotify.
KeepVid - A free web application that allows you to download videos
OutLoud Social Jukebox - Control the music with your friends in real-time
SaveFrom.Biz - Convert YouTube video URL to MP4 file and download it to your device. SafeFrom is the best YouTube video downloader and converter.