We like the idea of using rope as a substitute for conventional hardware. Here are a few options:
Above: Coiled Rope Knob from Anthropologie (1.5 inches in diameter), $10.
Above: Curtain tieback with star knot tassel in natural fiber rope from Stonk Knots Rope Design.
Above: a rope banister from UK outfit Stair Ropes that makes "stair ropes, banister rope, and rope handrails and barriers, using traditional rope working and knotting techniques."