Package: metacity

"metacity" package binaries on CentOS:

/usr/bin/metacity /usr/bin/metacity-message

You may install this package on CentOS with yum install metacity

"metacity" package binaries on Debian:

/usr/bin/metacity /usr/bin/metacity-message /usr/bin/metacity-theme-viewer /usr/bin/metacity-window-demo

You may install this package on Debian with apt-get install metacity