SSTT Bounce is a simple AR Browser, literally. It uses a WebKit based browser and adds fast AR NFT tracking to it. Rendering is done by using three.js. Beside that, Bounce can be also used as an authoring environment, it automatically detects changes in the file structure and reloads files accordingly. This allows for some nifty "in-place" editing.
Beware, its not optimized to say the least, nor otherwise safe to use. It will eat little kittens for breakfast. If you are still not scared, give it a go.