Zotero (pronounced "zoh-TAIR-oh") is an application that helps you collect, manage, and cite research sources. It's easy to use, connects with your web browser to download sources, and it's free.
Zotero allows you to attach PDFs, notes and images to your citations, organize them into collections for different projects, and create bibliographies.
For more help and tips, use the Metro State Library's guide to Zotero.
To use Zotero, you'll need to install two things:
Both of these are available from the Zotero download page.