Here are three older Openbox themes that have been part of PostX Gnu/Linux for awhile now. All themes are under GPL. Install these using Openbox obconf tool.
It is time to release an Openbox theme. If you are still unaware what Openbox is here comes a short introduction from www.openbox.org
“Openbox is a highly configurable, next generation window manager with extensive standards support.
The *box visual style is well known for its minimalistic appearance. Openbox uses the *box visual style, while providing a greater number of options for theme developers than previous *box implementations. The theme documentation describes the full range of options found in Openbox themes.” Continue reading