Clearlooks Pro is a good looking GTK theme for the GNOME desktop environment, based on the Clearlooks engine.
I wanted a more subtle GNOME environment but found that most themes didn't quite match what I needed.
I have taken the Unity theme (available in gnome themes extras) kept the blended appearance but tweaked clearlooks settings to create more subtle buttons.
The panel has been modified to use a dark panel colour which contrasts nicely with the unified windows.
Finally the colours are Suse green and a grey panel background is included in the archive.
Credit for the original theme created by Andrea Cimitan.
GNOME is an international effort to build a complete desktop environment—the graphical user interface which sits on top of a computer operating system—entirely from free software. This goal includes creating software development frameworks, selecting application software for the desktop, and working on the programs which manage application launching, file handling, and window and task management.
GNOME is part of the GNU Project and can be used with various Unix-like operating systems, most notably Linux, and as part of Java Desktop System in Solaris.
The name originally stood for GNU Network Object Model Environment, though this acronym is deprecated. The GNOME project puts heavy emphasis on simplicity, usability, and making things “just work”.