APT HOWTO
Chapter 8 - 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

Libranet (http://www.libranet.com)

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

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

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

APT4RPM (http://apt4rpm.sf.net)

Alt Linux (http://www.altlinux.ru/)

Red Hat (http://www.redhat.com/)

Sun Solaris (http://www.sun.com/)

SuSE (http://www.suse.de/)

Yellow Dog Linux (http://www.yellowdoglinux.com/)