It's very powerful, yet simple and easy to learn. I made it mostly for games I'm working on in game maker and my custom game engine, but it has alternate formats it can export for use in just about any language. I included a game maker project to demonstrate how to import the maps and spawn objects. If i see enough people using it i'll upload pseudo code or scripts for loading maps in other languages like C++. 

https://defiance.itch.io/map-maker