Find files provided by the installed package
dpkg -L emacs # Debian/Ubuntu
pacman -Ql emacs # ArchLinux
rpm -qlp emacs # Redhat/Centos
cygcheck -l emacs # Cygwin
brew ls --verbose emacs # Homebrew
equery f emacs # Gentoo Linux, you need install gentoolkit
gem contents zurb-foundation # Ruby gem