This is tool that can manage all the JSON data in friend’s RPG game I’m helping on called Fall of Agartha.
It’s currently under development and I’m programming it in C#. It works by loading in and manipulating JSONs. It’s much easier to add or edit entries and even see your changes right away ingame.
Another big thing is that the tool is great for modding. Theoretically, for any game that loads in JSON datafiles, the JSON companion can edit them. It finds the types of properties, like string, int, boolean, or you can add your own.