-
SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
-
PixiJS
The HTML5 Creation Engine: Create beautiful digital content with the fastest, most flexible 2D WebGL renderer.
-
Phaser
Discontinued Phaser is a fun, free and fast 2D game framework for making HTML5 games for desktop and mobile web browsers, supporting Canvas and WebGL rendering. [Moved to: https://github.com/phaserjs/phaser] (by photonstorm)
-
ct-js
Ct.js is a desktop game engine that makes learning programming fun and game development easy by its visual editors and well-documented code library
I think you can do a lot of this with [React-three-fiber](https://docs.pmnd.rs/react-three-fiber/getting-started/intro...) in combination with [React-three-flex](https://github.com/pmndrs/react-three-flex). React-three-fiber lets you make three.js components in react, and react-three-flex will let you do flexbox style layouts to make interesting UIs. You still get all of the capabilities of three.js with a lot of the plumbing done for you. Check out the examples from react-three-flex for some examples close to what it sounds like you want to achieve.