CalamityCraft is a mod that adds content from the tModLoader mod "Calamity" into Minecraft! While the mod is currently still under heavy development , a lot of updates will be released until a point where most of the basic content has been added. The mod can be downloaded using the files uploaded here, or you can download it from the "addons" tab in the official TerrariaCraft launcher making the installation process as simple as possible https://terrariacraft.com/
To stay up to date with development or anything else related to CalamityCraft or TerrariaCraft, feel free to join the Discord here https://discord.gg/ynQ2cMf.