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.
Partyhero - Pass your friends the aux!
KeepVid - A free web application that allows you to download videos
Join My Playlist - Listen to music live together with your friends in Spotify.
ShareTube - Watch YouTube, synced with friends.
OutLoud Social Jukebox - Control the music with your friends in real-time