NEW: Mendeley has released new versions of its Desktop & web products. The new versions are not back compatible, so any papers that you start on the old version of Mendeley should be completed using it (or you can re-enter your citations in the new version).
PLEASE NOTE: Do not sign in to Mendeley as an institutional account. We do not have that option currently, and you will lose access to your account after you log out. If this happens to you, please contact Mendeley Support. We recommend using Twitter for fastest service.
Mendeley is a citation management tool that, like many others, lets you collect & organize citations, & then easily insert them into documents & format bibliographies.
You can highlight and annotate your PDFs. Choose a color (not just yellow!) for your highlights and notes.
Use more than one computer? Download Mendeley Desktop to as many computers as you want, then sync them with a click of your mouse. Need to use your library away from your computer? Mendeley Web gives you access to your citations no matter where you are.
Collaborate by creating collections of papers in private groups. You can share PDFs (and your annotations) with anyone who is a member of your group.
The free version of Mendeley has some limitations on space (2 GB web storage, 500 MB each for personal shared storage) and users (25) for private, invite-only groups, but you can purchase premium plans for more web & personal storage space & more users & shared groups.
If you need more help with Mendeley