Nova is a nice GTK theme for Fluxbox or Openbox window managers.
You will need the pixmap engine and mist engine. There are now 4 colour schemes to choose from. Beryl theme is also included.
Fluxbox and Openbox themes are available at box-look.org
· Pixmap engine
· Mist engine
· GTK 2.x
· GNOME 2.x
What's New in This Release:
· Fixed the background problems with shutdown dialog and Create Launcher dialog in Gnome.