Dial Knob is not a very common UI you would see on a website. However, in webapps that are designed for devices with touch gestures, dial knob can be a very
More sweet settings toggles
Dribbble - Switches, Knobs & Buttons by David Stinnette
Starred & Checked Action Buttons by Brendon Manwaring at Dribbble
nice and radial design Broken UI Bits
Dribbble - Checkout progress bar - Web UI by Jason Wu
A look at some touchscreen elements created for the EXO UI user interface The Skins Factory created.
Dribbble - Analytics App Chart Tooltip UI Elements by Mason Yarnell