Ive made a Cario extension for Defold that includes a bunch of widgets and weird things
There are panels, buttons, lists, exploders, imagesliders, etc… all in lua, so you can easily build your own widgets for all sorts of use cases.
Feel free to download and mess with. I have only tested on Linux, but it should work on Windows and OSX. Will get around to testing them over the coming weeks once I have sorted out layer management.
Oh… yes, I know. I really need some nice art for a demo