Which distros support RPMs?  Which distros support DEB packages?  What other distros and package formats exists?  Here is what I think I know, but am interested in getting a more precise answer:RPM - Redhat, Fedora, CentOS, SUSEDEB - Debian, Ubuntu, Pacman - Archtar.gz - all, depends on what is in the compressed file thoughLots of others probably in the long tail.  I know you can use 'alien' to convert RPM to DEB, but it isn't installed by default in new Ubuntu setup so not counting that.
What are the different software packaging formats and which distributions support them as part of base install?
linux;packaging
There's a list of Linux Package Formats on wikipedia here and a list of common package management systems here.