Other Social Book marking Sites
Social bookmarking is saving bookmarks to a public Website and “tagging” them with keywords. Bookmarking, on the other hand, is the practice of saving the address of a Web site you wish to visit in the future on your computer.
One needs to register with a social bookmarking site to have a collection of social bookmarks. Some sites periodically verify that bookmarks still work, notifying users when a URL no longer functions. Visitors to social bookmarking sites can search for resources by keyword, person, or popularity and see the public bookmarks, tags, and classification schemes that registered users have created and saved.
Other Social Book marking Sites
http://slashdot.org
http://digg.com
http://reddit.com
http://stumbleupon.com
http://connotea.org
http://delicious.com
http://weheartgossip.com
http://technorati.com
http://mixx.com
http://citeulike.org
http://mister-wong.com
http://diigo.com
http://squidoo.com
http://connotea.com
http://metafilter.com
http://designfloat.com
http://fark.com
http://newsvine.com
http://bibsonomy.org
http://blinklist.com