Blaze is a loader for JavaScript (via GraalJS) with bindings to Bukkit. It has the ability to dynamically add and remove commands and listeners at runtime. As well as a code reloading system. Write JavaScript and have it instantly take effect in-game.

Note that at this point in time this project is not ready for production. You may encounter memory issues with the code hot-replacement system, and possible attack vectors would need to be better evaluated.

Download here