Before Openbox, there was Fluxbox. Fluxbox is not as cool as Openbox. But if you need config or just curious about, you can check this out.
I myself, still don’t know why I even learn this.
This Fluxbox utilised a modified version of Axonkolor theme that I found in Deviantart.
Fluxbox: Arch Configuration:
Fluxbox: Debian Configuration: