This tool uses Geometry Nodes and curves to generate chains for the most common uses, because it's highly customizable.

https://blendermarket.com/products/procedural-generator-bundle

You can attach the curve to a surface to create a chain or a bracelet.

You can connect the curves making the process of drawing the curve a lot easier.

There are controls for radius, tilt, width, bevel, roundness, rotate... everything updated in realtime and as it uses instances, you can work dont need to care about performance while using it.

You can also use your own custom chain meshes!

It already comes with a chain material that will work in most situations and UVs, stored on the Attributes.

To use that you just need to Append the "chain.blend" to your scene
Create a curve to add a Geometry Nodes modifier, and select the "CHAINGEN"
You can watch the video bellow to see how to use it.