Free jQuery knob Plugins
All the Free jQuery Plugins about 'knob' are listed here.
fancyknob is an easy-to-use jQuery plugin which converts the normal range input into a nice, customizable knob with support for both mouse drag and touch interactions.
Knob.js is a jQuery UI widget used for generating a pretty nice, SVG-based knob where you're able to change the arc degrees by mouse drag and move.
rotarySwitch is a jQuery plugin that converts the default text input into a flexible, knob-style Rotary Switch for multiple purpose.
Codex Graph is a lightweight jQuery plugin used to create an animated knob-like graph from a list of items with Html5 data-pamt attributes.