CraftTweaker

CraftTweaker is a mod created by and. It is the official continuation of by  that allows users to customize modpacks and servers by utilizing a simple scripting language named Zenscript. CraftTweaker is often used to fix conflicting recipes and make mod recipes interact and balance well with one another. It is used to add, change, or remove crafting and smelting recipes, alter item names, customize the ore dictionary, edit tooltips, and a variety of other options.

The scripting language CraftTweaker uses, named Zenscript, was created for easy use but also offers more features for the advanced user.