This is the Steve's Carts 2 mod for Minecraft.
Per the following tweet, anyone is free to clone this code, and create a version of the mod.
In possession of the source of my mc mods? You're allowed to distribute it, update it, tweak it and release it. Just credit me for my work.
— Vswe (@Steves_Carts) November 6, 2016
This version of the mod has been forked by the GTNH team.