CiteULike

CiteULike is a website to maintain references to papers.

Advantages

• Provides a browser bookmarklet that makes it easy to add a reference from the webpage of any paper.

• Tags

• Easy to generate BibTeX entry from any saved reference.

• Can store the PDF of paper along with the reference, so you can access it from anywhere.

Disadvantages

• Cannot edit the BibTeX entry it maintains for a paper.