Flickr

Flickr is a photo sharing website and web services suite, and an online community platform. It was one of the earliest Web 2.0 applications. In addition to being a popular Web site for users to share personal photographs, the service is widely used by bloggers as a photo repository. Its popularity has been fueled by its innovative online community tools that allow photos to be tagged and browsed by folksonomic means. It hosts over 2 billion images.

In March 2005, Yahoo! Inc. acquired Ludicorp and Flickr.

Flickr asks photo submitters to organize images using tags (a form of metadata), which allow searchers to find images concerning a certain topic such as place name or subject matter. Flickr was also an early website to implement tag clouds, which provide access to images tagged with the most popular keywords. Because of its support for tags, Flickr has been cited as a prime example of effective use of folksonomy.

Alexa: 38 | Pagerank: 9 | Google links: 1,530,000 | Yahoo links: 29,370,677 | Google index: 73,300,000 | Yahoo index: 355,553,224

RESOURCES:

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pownce.com

After 7 months of betatesting Pownce has open doors to the pubblic today. This social networking and micro-blogging site is about sharing messages, files, events, and links with already-established friends.

Pownce has been compared favorably to other websites with similar functionality like Twitter, and has been called a "Twitter on steroids". It has also been recommended for use over Twitter in a work setting because of its enhanced discussion-tracking capabilities.

Alexa: 11,012 | Pagerank: 7 | Google links: 10,500 | Yahoo links: 938,000 | Google index: 626,000 | Yahoo index: 743,000

Resources:

• Pownce Official Blog
• Kevin Rose’s New Startup: Pownce
  Covering the launch of Pownce in June 2007
• Post to Pownce, Twitter, Jaiku and Tumblr at The Same Time
• Miniblogging: 8 Pownce Rivals Compared
• Interview with Leah Culver: The Making of Pownce

Neosozial @ Pownce

trendio.com

Trendio is is an online prediction stock market. Users buy stock in certain news subjects with fake money. Words available include those from the world of politics, sport, entertainment, and so on. Users can add new words. The more the word appears in the news, the higher the value of the stock.

Alexa rank: 126,757
Google pagerank: 5
Backlinks: 565 (G) - 18,800 (Y)
Indexed pages: 37,600 (G) - 23,400 (Y)

RESOURCES:

• Trendio - Bet on News Trends
• Trendio: A stock market for words and ideas

Neosozial @ Trendio

del.icio.us

del.icio.us is probably the first social bookmarking website that people heard about years ago (when they never suspected the existence of such a thing like social bookmarking or web 2.0).

Founded by in 2003, it was acquired by Yahoo! in 2005 (for somewhere between US$15 million and US$30 million). Nowadays it's one of the most visited website of the internet.

Alexa rank: 391
Google pagerank: 8
Backlinks: 871,000 (G) - 32,400,000 (Y)
Indexed pages: 1,570,000 (G) - 104,000,000 (Y)

RESOURCES:

• Delicious Bookmarks : Delicious Bookmarks
  The Official Delicious Add-on seamlessly integrates your browser with del.icio.us, the leading social bookmarking service on the Web.
• Delicious Official Blog
• Top 10 Ways to Use del.icio.us
• Absolutely Del.icio.us
  A huge collection of links to tools that use del.icio.us in some way.