SOCIAL NETWORKING SITES

Facebook: 

Facebook is a popular free social networking website that allows registered users to create profiles, upload photos and video, send messages and keep in touch with friends, family and colleagues. The site, which is available in 37 different languages.

Twitter: 

Twitter is a free social networking service that allows registered members to broadcast short posts called tweets. Twitter members can broadcast tweets and follow other users' tweets by using multiple platforms and devices. 

Whatsapp: 

WhatsApp Messenger is a cross-platform instant messagin application that allows iPhone, BlackBerry, Android, Windows Phone and Nokia smartphone users to exchange text, image, video and audio messages for free. 

Social Nets web:

Social networking is the practice of expanding the number of one's business and/or social contacts by making connections through individuals. While social networking has gone on almost as long as societies themselves have existed, the unparalleled potential of the Internet to promote such connections is only now being fully recognized and exploited, through Web-based groups established for that purpose.

Internet forum

:An Internet forum, or message board, is an online discussion site where people can hold conversations in the form of posted messages. They differ from chat rooms in that messages are often longer than one line of text, and are at least temporarily archived. 

Slideshare:
SlideShare is a Web 2.0 based slide hosting service. Users can upload
files privately or publicly in the following file formats: PowerPoint, PDF,Keynote or OpenDocument presentations. Slide decks can then
be viewed on the site itself, on hand held devices or embedded on other sites.

Infographych:
Information graphics or infographics are graphic visual representations of information, data or knowledge intended to present complex information quickly and clearly.

Pinterest:
Pinterest is a web and mobile application company that offers a visual discovery, collection, sharing, and storage tool. Users create and share the collections of visual bookmarks (boards)

Pic Monkey:
PicMonkey is an online photo editing service headquartered in Seattle, Washington, which was founded in April 2012 by two formerPicnik engineers, Brian Terry and Justin Huff.

Wikispace:
Wikispaces is a web hosting service based in San Francisco, California. Launched by Tangient LLC in March 2005, Wikispaces was purchased by TSL Education in March 2014. It competes with PBworks, Wetpaint, Wikia, andGoogle Sites. It was among the largest wiki hosts.

App inventor:
App Inventor for Android is an open-source web application originally provided by Google, and now maintained by theMassachusetts Institute of Technology (MIT).

It allows newcomers to computer programming to create software applications for the Android operating system.

http://appinventor.mit.edu/explore/ai2/tutorials.html