Facebook is a social networking service and Web sitelaunched in February 2004, operated and privately owned byFacebook. As of July 2011 Facebook has more than 800million active users.Facebook was founded by Mark Zuckerberg with his collegeroommates and fellow computer science students EduardoSaverin, Dustin Moskovitz and Chris Hughes.A January 2009 Compete.com study ranked Facebook as themost used social networking service by worldwide monthlyactive users, followed by MySpace
is a free, web-based, collaborative, multilingual encyclopediaproject supported by the non-profit Wikimedia Foundation. Its 20million articles (over 3.78 million in English) have been writtencollaboratively by volunteers around the worldWikipedia was launched in 2001 by Jimmy Wales and LarrySanger. Sanger coined the name Wikipedia, which is aportmanteau of wiki (a technology for creating collaborativewebsitesWikipedias departure from the expert-driven style ofencyclopedia building and the large presence of unacademiccontent has often been noted.
Twitter is an online social networking and microbloggingservice that enables its users to send and read text-basedposts of up to 140 characters, informally known as "tweets".Twitter was created in March 2006 by Jack Dorsey andlaunched that July. Twitter rapidly gained worldwidepopularity, with 200 million users as of 2011, generating over200 million tweets and handling over 1.6 billion searchqueries per day. It is sometimes described as "the SMS of theInternet."
Blogger is a blog-publishing service that allows private or multi-user blogs with time-stamped entries. It was created by PyraLabs, which was bought by Google in 2003. Generally, the blogsare hosted by Google at a subdomain of blogspot.com.Up until May 1, 2010 Blogger allowed users to publish blogs onother hosts, via FTP. All such blogs had (or still have) to bemoved to Googles own servers, with domains other thanblogspot.com allowed via Custom URLs.[
PBworks (formerly PBwiki) is a commercial real-time collaborativeediting (RTCE) system created by David Weekly, with Ramit SethiandNathan Schmidt joining shortly thereafter as co-founders. Based in SanMateo, California, the companys original name stems from their belief that"making a wiki is as easy as making a peanut butter sandwich".Thecompany operates on a freemium basis, with basic features being offeredfor free and more advanced features for a fee.PBworks investors include Mohr Davidow Ventures and the SeraphGroup, as well as angel investors Ron Conway and Chris Yeh.In June 2008 the company hired Jim Groff, a former employee of OracleCorporation and Apple Inc. for its new CEO. David Weekly, the formerCEO, remains its Chief Product Officer and Chairman.
WordPress is a free and open source blogging tool andpublishing platform powered by PHP and MySQL. It is oftencustomized into acontent managemen system (CMS). It hasmany features including a plug-in architecture and a templatesystem. WordPress is used by over 14.7% of Alexa Internets"top 1 million" websites and as of August 2011 powers 22% ofall new websites. WordPress is currently the most popularCMS in use on the Internet.It was first released on May 27, 2003, by Matt Mullenweg as afork of b2/cafelog. As of February 2011, version 3.0 had beendownloaded over 32.5 million times.
Second Life is an online virtual world developed by Linden Lab. It waslaunched on June 23, 2003. A number of free client programs, orViewers, enable Second Life users, called Residents, to interact with each otherthrough avatars. Residents can explore the world (known as the grid), meetother residents, socialize, participate in individual and group activities, andcreate and trade virtual property and services with one another. Second Life isintended for people aged 16 and over, and as of 2011 has about one millionactive users.Built into the software is a three-dimensional modeling tool based around simplegeometric shapes that allows residents to build virtual objects. There is alsoa procedural scripting language, Linden Scripting Language, which can be usedto add interactivity to objects.Sculpted prims (sculpties), mesh, textures forclothing or other objects, and animations and gestures can be created usingexternal software and imported. The Second Life Terms of Service provide thatusers retain copyright for any content they create, and the server and clientprovide simple digital rights management functions.
Picasa is an image organizer and image viewer fororganizing and editing digital photos, plus an integratedphoto-sharing website, originally created by Idealab in 2002and owned by Google since 2004. "Picasa" is a blend of thename of Spanish painter Pablo Picasso, the phrase mi casafor "my house", and "pic" for pictures (personalized art).In July2004, Google acquired Picasa and began offering it as a freedownload.
YouTube is a video-sharing website, created by three formerPayPal employees in February 2005, on which users canupload, view and share videos.The company is based in San Bruno, California, and uses AdobeFlash Video technology to display a wide variety of user-generatedvideo content, including movie clips, TV clips, and music videos, aswell as amateur content such as video blogging and short originalvideos. Most of the content on YouTube has been uploaded byindividuals, although media corporations includingCBS, BBC, VEVO, Hulu, and other organizations offer some of theirmaterial via the site, as part of the YouTube partnership program.
Google Inc. is an American multinational public corporationinvested in Internet search, cloud computing, and advertisingtechnologies. Google hosts and develops a number ofInternet-based services and products, and generates profitprimarily from advertising through its AdWords program. Thecompany was founded by Larry Page and Sergey Brin, oftendubbed the "Google Guys",while the two were attendingStanford University as PhD candidates.
Google+ (pronounced and sometimes written as GooglePlus, sometimes abbreviated as G+) is a social networking andidentity service, operated by Google Inc.The service was launched on June 28, 2011, in an invite-only "fieldtesting" phase. The following day, existing users were allowed toinvite friends who were over 18 years of age to the service to createtheir own accounts. This was suspended the next day due to an"insane demand" for accounts.On August 6, each Google+ memberhad 150 invitations to give out, but on September 20, 2011, Google+was opened to everyone 18 years of age or older without the needfor an invitation.After Google+ went public, users registered toGoogle+, but those under 18 years of age were unable to sign up forGoogle+.