CiteULike is a free service to help you to store, organise and share the scholarly papers you are reading. When you see a paper on the web that interests you, you can click one button and have it added to your personal library. CiteULike automatically extracts the citation details, so there's no need to type them in yourself. It all works from within your web browser so you can access it from any computer with an Internet connection. CiteULike supports annotation and rating of items, and upload of attachments (e.g. PDF file). (Attachments are only accessible privately by individual users). Bibliographic entries can be imported singly or in batches using BibTex or RIS formats.