Package Management

tgz
zipped-tarball (*.tgz)

dpkg
Debian Package (*.deb)

rpm
http://www.rpm.org/
Redhat Package Manager (*.rpm)

APT
Advanced Packagee Tools (started as a front-end of dpkg, now for a lots)

http://www.nongnu.org/synaptic/
apt + gui 介面(by Gtk+)

Ports collection
for BSD

Portage
derived from BSD ports and Debian APT, used by Gentoo Linux