For all of you students out there, consider this web site a gift. (Does anyone else besides students have to make APA or MLA style bibliographies?). Carmun has the “Killer Bib Tool” which automatically correctly cites your sources according to MLA or APA format. The tool organizes them in to an alphabetical list and stores them by project in your account. And the service is totally free, and just requires signing up. Aside from the Killer Bib Tool, Carmun also lets you save and access bookmark URLS , insert footnotes in to your papers as you write, and ask and answer questions posted by other students. So this is definitely one site to bookmark, whether your in highschool or graduate school.
Updated December ’09: Carmun is no longer in service. Check out bibme, it’s another free service that generates works cited.