Zotero is a powerful, easy-to-use research tool that helps you gather, organize, and analyze sources and th...

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Google+ aims to make sharing on the web more like sharing in real life. Check out Circles, Messenger and Hangouts, just a few of the things we&#39...

Facebook is a social utility that connects people with friends and others who work, study and live around them. People use Facebook to keep up with fr...