Download

http://www.codemadness.nl/downloads/themes/gtk/murrine-rape/gtk-2.0/gtkrc

Screenshot

Features

• Good contrast between UI elements and consistency (imho).
• Plain colours; no bright colours and (almost) no gradients.
• No rounded borders.
• No animations (progressbar etc).
• Uses the fast and easy customizable gtk-engine-murrine.

Dependency

Depends on the git version of gtk-engine-murrine last I checked: http://www.cimitan.com/murrine/