Try a search on “koha”

From the CiteULike FAQ:

“What is CiteULike?

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….CiteULike has a flexible filing system based on tags….Groups are collections of users creating shared libraries of links. They are useful for keeping track of a particular topic or what everyone else in a lab, class or academic department is reading. You can start your own groups and join existing groups.”