Mendeley

Mendeley is free social software for managing and sharing research papers. It is also a Web 2.0 site for discovering research trends and connecting to like-minded academics.

Mendeley Desktop is more than a reference manager:

* Automatic extraction of metadata and cited references from PDFs to create your own personal library database
* Tag, full-text search, share, and annotate your research papers collaboratively
* Back up your research papers to Mendeley Web and access them online