This is Del.icio.us

Check out Del.icio.us This free software is a collection of favourites - yours and everyone elses. Use Del.icio.us to:
Keep links to your favourite articles, blogs, music, restaurant reviews and more on del.icio.us and access them from any computer on the web
Share favourites with friends, family and colleagues
Discover new things. Everything on del.icio.us is someone's favourite - they've already done the work of finding it. Explore and enjoy.