ATrpms - by Distribution

There is currently only Red Hat as a supported distribution, but a lot of packages have been reported to work on other distributions, too.

Notably Mandrake seems to take the rpms even in a binary form, and others can use the source rpms.

The packages are categorized according to their stability.

stable packages imply minimal upgrading risk. They are considered very well tested.
You will usually find slight modifications to Red Hat's own packages here.
good packages have been working very well, but there hasn't yet been enough third party feedback to judge on more setups.
testing packages are provided on a "works for me" basis.
bleeding packages means asking for trouble!
obsolete packages will be removed soon.

The stable, good and testing packages are enabled by default in apt-get and yum. bleeding packages can be enabled in the respective configuration files, while obsoleted packages are offered only for manual download.