Accordion Control/Container For a Desktop App

Hi Folks,

I’m working on a new project that is going to tie into Adobe’s Creative Cloud tools. I’d like to implement an accordion style control similar to Photoshop’s Controls Palette (example below). Has anyone created a plugin or container with this functionality (free or paid)?

And before THAT discussion happens, YES I am will to code something myself. I’m just asking if it’s already been done and is available so that I’m not reinventing the wheel.

Tim might be something you’re looking for.
If you’re watching the GIF, wait for the Xojo demo to be over, the right side is smooth, doesn’t flicker, and it offers the collapsing you’re looking for.

Thanks, Tim and Neil!