Mendeley is a reference and papers manager, academic collaboration network and crowdsourced database. Mendeley Desktop is available on Mac, Windows and Linux. Mendeley Web functions on all major browsers. Mobile versions of Mendeley are available for Ipad, Iphone and Android devices.
Mendeley Basic is free and provides:
Create an online account at Mendeley.com
You will be prompted to download and install the Desktop version
Open Mendeley on your computer and log in using your account credentials
Choose Tools > Install Web Importer from the menu bar in Mendeley Desktop to install the web importer bookmarklet and insert a "Save To Mendeley" button on your toolbar
Install the citation plugin for Word.