Reference

http://www.linux.duke.edu/projects/yum/ The home page of the yum project, hosted at Linux@Duke (Duke University).

http://rpm.livna.org/ The Livna yum repository.

http://freshrpms.net/ The FreshMeat yum repository. It's part of the OSTG, which also includes slashdot and linux.com.

http://dag.wieers.com The yum repository of Dag Wieers.

http://atrpms.net ATrpms yum repository. It includes some highly unstable packages, so use it at your own risk!

http://apt.sw.be/dries/ Dries's yum/apt repository.

http://www.fedorafaq.org/ A useful, but unofficial, source of information. It gives locations of GPG keys for all the previously mentioned repositories.