Recent coffee table I designed:
Walnut / Clear glass
Maple / Smoked glass
The bolt in the center holds the piece together, and steel dowels act as spacers.
I designed it to be as minimal in parts and waste as possible. And it's totally collapsible, even if you live in a small apartment like me.
I still haven't really figured out how to strengthen the joinery yet. I've only tested it to about 170lbs, and generally furniture of this type should hold 200lbs easily. I think a simple powder coated sheet metal bracket could complement the design, but I'm still working out the best way to strengthen it, without making the simple functional design more complicated.