Digg is a place for people to discover and share content across the web, from the biggest online destinations to the most obscure blog, every article submitted to Digg has a count of how many Diggs the story has received. You need to be signed-in to Digg a story. For every registered user that clicks "Digg it" the count goes up one. If a story reaches the tipping point, then it get promoted to the homepage.  For more info click on http://digg.com/about/

.Delicious is a social bookmarking service that allows users to tag, save, manage and share web pages from a centralized source. With emphasis on the power of the community, Delicious greatly improves how people discover, remember and share on the Internet.  Instead of having different bookmarks on every computer, Delicious makes it easy to have a single set of bookmarks kept in sync between all of your computers. Even if you're not on a computer you own, you can still get to your bookmarks on the Delicious website.  For more info click on http://delicious.com/about

About Diigo (Digest of Internet Information) or  furl

If you browse or read a lot on the web, we believe you will find Diigo essential. Diigo is two services in one, it is a research and collaborative research tool on the one hand, and a knowledge-sharing community and social content site on the other. Diigo provides a browser add-on that can really improve your research productivity. As you read on the web, instead of just bookmarking, you can highlight portions of web pages that are of particular interest to you. Diigo enables effective collaborative research. You can easily share your findings, complete with your highlights and sticky notes, with friends and colleagues. A project team, a class, or a club can create a group on Diigo to pool relevant resources, findings and thoughts together.  For more info click on http://www.diigo.com/about

Reddit is a source for what's new and popular on the Internet.
Users can provide all of the content and decide, through voting, what's good and what's not. Links that receive community approval bubble up towards #1, so the front page is constantly in motion and filled with interesting links.  For more info click on http://www.reddit.com/help/faq - Whatisreddit

Yahoo! Bookmarks (Yahoo! This) is an online service that lets you save links to your favorite web pages with your Yahoo! account so that you can access them from any computer connected to the Internet anywhere around the world. If you’ve bookmarked pages using your browser’s feature, you can put those links into your Yahoo! Bookmarks.For more info click on http://help.yahoo.com/l/us/yahoo/bookmarks/basics/bkmks-01.html;_ylt=ArIgSUqjw4lc2gnptfpiWlS8PXdG

StumbleUpon helps you discover and share great websites. As you click Stumble!, it delivers high-quality pages matched to your personal preferences. These pages have been explicitly recommended by more than 8 million other websurfers. StumbleUpon uses ratings to form collaborative opinions on website quality. When you stumble, you will only see pages that stumblers have recommended. Click on: http://www.stumbleupon.com/aboutus/

Google Bookmarks is an online service that lets you save your favorite sites. Unlike the bookmark feature from your browser, bookmarks are stored securely online, so they are accessible even if you're using other computers.for more info click on http://www.google.com/bookmarks/

LiveFavorites combines a sleek design with the flexibility for your bookmarks, RSS feeds / blogs, contacts and memos. Use it to access to your favorite information from any Internet connection!  For more info click  on  the  http://www.livefavorites.com/

Technorati is an Internet search engine for searching blogs.  According to their about page, Technorati currently tracks over 80 million blogs. Every time one of those blogs writes something new, they send a ping to Technorati, telling them they've posted something new along with some tags and basic information about the post. Technorati immediately adds that post to every search for any of those tags. For more info click http://technorati.com/