From LQWiki

Metacity (pronounced like "opacity") is the standard Window Manager for GNOME. It was originally written by Havoc Pennington. Unlike most window managers metacity is designed to merge seamlessly with the rest of the GNOME desktop, and so provides very little functionality on it's own.

There are lots of themes for metacity. look here: Gnome Art

External links

• Download location (ftp.gnome.org)