WebTechResources - Find best tech resources everyday, sorted by people like you, ready to select and use.
Spotify - Map shows when two people play same song at same time
JSter - JSter is a community-driven catalog of the most useful javascript libraries.
Last.fm - The world's largest online music service. Listen online, find out more about your favourite artists, and get music recommendations, only at Last.fm
AlternativeTo - AlternativeTo lets you find apps and software for Windows, Mac, Linux, iPhone, iPad, Android, Android Tablets, Web Apps, Online, Windows Tablets and more by recommending alternatives to apps you already know.
SoundCloud - Enjoy music & follow favourite artists