DELICIOUS

Delicious (formerly del.icio.us) is a social bookmarking web service for storing, sharing, and discovering web bookmarks. Delicious helps you find cool stuff and collect it for easy sharing. Dig into stacks created by the community, and then build your own!

Delicious has a "hotlist" on its home page and "popular" and "recent" pages, which help to make the website a conveyor of Internet memes and trends. Delicious is one of the most popular social bookmarking services. Use of delicious is free.

For more information here: http://delicious.com/
This is a print screen from my delicious account