Addons - CraftTweaker

Supporters Mod 1.13/1.12.2/1.11.2 - Allows modpacks and mods to incorporate supporters into the game experience.

InWorldCrafting Mod 1.13/1.12.2/1.11.2 - Crafttweaker integration that lets you craft in the world with Fluids, Fire or Explosions.

Zen Triggers Mod 1.13/1.12.2/1.11.2 - Adds methods to allow for the execution of Minecraft in response to certain events happening

CraftTweaker Mod 1.13/1.12.2/1.11.2 - A continuation of MineTweaker originally by StanH

CompatSkills Mod 1.13/1.12.2/1.11.2 - Mod Compat Addon for Reskillable

IC2 Tweaker Mod 1.13/1.12.2/1.11.2 - CraftTweaker (for Minecraft 1.12.+) support for IC2-experimental

ExplosionCrafting Mod 1.13/1.12.2/1.11.2 - CraftTweaker addon for explosive recipes

HitWithAxe Mod 1.13/1.12.2/1.11.2 - Hit it with an axe

FluidTransformTweaker Mod 1.13/1.12.2/1.11.2 - A CraftTweaker addon for in-world fluid transformations.

Thaumic Restoration Mod 1.13/1.12.2/1.11.2 - Another Thaumcraft Addon

TZP Frames Mod 1.13/1.12.2/1.11.2 - The Mod to the Modpack TheZeroProject 4

Artisan Worktables Mod 1.13/1.12.2/1.11.2 - Themed worktables with a tool slot. Optional tools provided. CraftTweaker, JEI, GameStages.

Plants Mod 1.13/1.12.2/1.11.2 - Experience the natural world; of reality, and fiction.

Prodigy Tech Mod 1.13/1.12.2/1.11.2 - Tech mod powered on hot air and unusual materials.

Thaumic Readoption Mod 1.13/1.12.2/1.11.2 - Another Thaumcraft Addon

Zencessories Mod 1.13/1.12.2/1.11.2 - A suite of little Zenscript Additions that may be helpful

Research Table Mod 1.13/1.12.2/1.11.2 - Allows pack maker to create research-based tech tree

Prestige Mod 1.13/1.12.2/1.11.2 - Allows progress that extends beyond a world.

Game Stages Mod 1.13/1.12.2/1.11.2 - An API for adding stages, for modpacks and other mods to use!

Zen Summoning Mod 1.13/1.12.2/1.11.2 - Allows for custom mob summoning with CraftTweaker

Singularities Mod 1.13/1.12.2/1.11.2 - Standalone singularities - with customization!

Embers Rekindled Mod 1.13/1.12.2/1.11.2 - A Dwarven-themed Magic Mod. With bugfixes and additions.