Facebook is a social networking site with over 800 million active users who create personal profiles, add friends, and share messages. Wikipedia is a free, collaborative online encyclopedia with over 20 million articles written by volunteers in 282 languages. Twitter is a social media platform where users share short messages, and was originally named "twttr"; it has grown from 18 employees in 2008 to over 50 today.

2.  Facebook
 Wikipèdia
 Twitter
 Blogger
 P.Bworks
 Wordpress
 Second life
 Picasa
 Youtube
 Google
 Google plus +

3. Facebook is a social networking service and Web site.
Facebook has more than 800 million active users.[Users must
register .
They have to create a personal profile, add other users as
friends, and exchange messages, including automatic
notifications when they update their profile.
Facebook allows any users who declare themselves to be at
least 13 years old to become registered users of the site.

4. Wikipedia is a free, web-
based, collaborative, multilingual encyclo
pedia project supported by the non-
profit Wikimedia Foundation. Its 20 million
articles (over 3.78 million in English) have
been written collaboratively by volunteers
around the world.
Almost all of its articles can be edited by anyone with access to
the site,] and it has about 90,000 regularly active contributors. As of
July 2011, there are editions of Wikipedia in 282 languages. It has
become the largest and most popular general reference work on
the Internet, having an estimated 365 million readers worldwide.[ It
is estimated that Wikipedia receives 2.7 billion monthly pageviews
from the United States alone

5. Twitter started as a research and
development project.
The original name of the product
was twttr, inspired by Flickr. It was
initially used internally by the
developer until it was officially
launched to the public in October of
that year. The service rapidly
gained adherents, and in
March 2007 won the South by
Southwest Web Award in the
category of blog.
Jack Dorsey is the father of this web application and
current Chairman of the Boardof Directors of Twitter, Inc, a
company that grew out of Obvious, LLC and the success
of Twitter. In early 2008, the Twitter team was composed of 18
persons, in 2009,Twitter has increased its staff by four and
growing.

6. This is a blog that you
can publish something.
And you have a lot of
applications that you ca
put it in your blog and
the people can play
with it. It’s really good
because you can put
information that the
people don’t know and
they can learn it.

7.  Second Life is an online virtual world
developed by Linden Lab. It was launched on
June 23, 2003. A number of free client
programs, or Viewers, enable Second Life users,
called Residents, to interact with each other
through avatars. Residents can explore the
world , meet other residents, socialize,
participate in individual and group activities,
and create and trade virtual property and
services with one another. Second Life is
intended for people aged 16 and over, and as
of 2011 has about one million active users

8.  YouTube is a video-sharing website,
created by three former PayPal
employees in February 2005, on which
users can upload, view and share
videos.

9.  Google Inc. is an American multinational public
corporation invested in Internet search, cloud
computing, and advertising technologies. Google
hosts and develops a number of Internet-based
services and products, and generates profit
primarily from advertising through its AdWords
program

10.  is a social networking and identity
service, operated by Google Inc.