Assuming you know what you are doing, here are the apt/sources.list lines to add so that you may use the packages here:
deb http://debian.ringlet.net/debian-ringlet unstable main deb-src http://debian.ringlet.net/debian-ringlet unstable main
If you are feeling particularly adventurous, you may also add the UNRELEASED distribution, although I would kind of recommend against it for general usage :)
Some of the packages in this repository:
Contacts: Peter Pentchev