Ask HN: Are there any html ui-kits specifically for parameter-twiddling?

I'm building a small application that would greatly benefit from having custom more user-friendly parameter-adjusting ui controls.

I'm thinking of the kind of controls you would find in cad programs, game engines and fractal explorers etc.

I could build them myself, but I would greatly prefer to use (and contribute) to an existing kit. If not, I'm afraid I will have to start such a project myself.