Zotero [zoh-TAIR-oh] is a free, easy-to-use tool to help you collect, organize, cite, and share your research sources.
Zotero is an application that can pull source information from the very websites your're using to find resources. You're then able to organize your sources with tags and folders and you can attach PDFs and notes. When you need to reference those sources, Zotero makes it easy to create proper citations and to share sources with friends and colleagues.
If you would like to watch a video tutorial, click the links below.