This project was originally started because I wanted to make a DnD-like RPG game, homebrew and all. Instead, it has grown quite significantly in scope since then and has basically become its own engine on top of LibGDX.
This project is focused around Modding, Data-Driven assets, and allowing for any code you want to be run. Being open-source and relatively lightweight, it makes this very easy and fast to add new features, and/or to code or your own mod.
Install instructions are located here.
I highly recommend you check out the rest of the wiki, as it has far more info than here.
We also have a JavaDoc (TBD) and Contribution Guidelines if you're interested.
1D6 will forever remain Free Open Source Software under GPL-v3.0 license, with it's assets under CC-BY-NC-V4.
LibGDX is under Apache-2.0.
MiniSponge Loader is also under GPL-v3.0, as well as the MiniMods Software License Agreement.
The rest of the dependencies are under their own licenses, and are listed in build.gradle.
All art and music assets are owned by their respective creators, please ask them about licensing.
Most of the time you should be fine; but especially for music/audio related assets, it's best to shoot them an email or something first.