RpmFusion aims to bring together many packagers and build a single add-on repository for [http://fedoraproject.org/ Fedora] and [http://www.redhat.com/rhel/ Red Hat Enterprise Linux] where users will be able to find all the software which isn't legally possible to include in those distributions.
RpmFusion will try to merge the following add-on repositories :
http://rpmforge.net/ (at least partially)
Also see our FoundingPrinciples
For packagers :