APT HOWTO
Capítulo 6 What distributions support APT?

Here are the names of some of the distributions that use APT:

Debian GNU/Linux (http://www.debian.org) - it was for this distribution that APT was developed

Conectiva (http://www.conectiva.com.br) - this was the first distribution to port APT for use with rpm

Mandrake (http://www.mandrake.com)

PLD (http://pld.org.pl)

Vine (http://www.vinelinux.org)