CiteULike – Sharing academic papers
CiteULike is a free service where academics can share, store, and organise academic papers they are reading. You can add papers on the web that interests you with one click button to your personal library. You can share your library with others, and find out who is reading the same papers as you. In turn, this can help you discover literature which is relevant to your field but you may not have known about. Furthermore, CiteULike automatically extracts the citation details, so when it comes to writing up your results in a paper, you can export your library to either BibTeX or Endnote to build it in to your bibliography.