Pretty much just a whole ton of create addons. With create you are able to make automatic factories with conveyor belts and mechanical arms etc. Create is also awesome for messing with friends, you can make their houses spin in circles or even put their houses on trains and drive them far far away.

Addons include:

Architectury API

AttributeFix

Bad Mobs

Balm

Better Fps

Bookshelf

Canary

Chipped

Chunk Loaders

Chunk Sending

Citadel

Client Crafting

Cloth Config API

Collective

Comforts

Connectivity

Corpse

Crafting Tweaks

Create

Create Confectionery

Create Enchantment Industry

Create: Steam 'n' Rails

Cupboard

Curios API

DoesPotatoTick?

Embeddium

Enchantment Descriptions

Farmer's Delight

GPU Memory Fix

FTB Chunks

FTB Library

FTB Quests

FTB Xmod

Fusion

Guard Villagers

ImmediatlyFast

Item Filters

Jade

Jade Addons

Just Enough Items

Just Enough Resources

Konkrete

Kotlin

Limited Chunkloading

Lootr

Macaw's Fences and Walls

Macaw's trapdoors

ModernFix

Neruina

Not Enough Animations

Polymorph

Puzzles Lib

Rechiseled

Recipe Essentials

Redirector

Resourceful Lib

Server Performance

Sophisticated Backpacks

Sophisticated Core

Straw Statues

Structure Essentials

SuperMartijn642's Core Lib

Villager Names

Xaero's Minimap

Alex's Caves

Alex's Delight

Alex's Mobs

Apple Skin

Athena

Better Animations

Better VIllages

Botarium

Bountiful

Callable Horses

Clockwork: Create x Valkyrien Skies

Clumps

Controlling

Create Big Cannons

Create Chunkloading

Create Compact EXP

Create Mechanical Spawner

Create Ore Excavation

Create Recycle Everything

Create Slice & Dice

Create Stuff & Additions

Create: Additional Recipes

Create: Big Contraptions

Create:Broken Bad

Create; Broken Bad Usable product

Create: Diesel Generators

Create: Estrogen

Create: Extended Cogwheels

Create: Interiors

Create: Liquid Fuel

Create: militarized

Create: More Automation

Create: More Drill Heads

Create: New Age

Create: Oppenheimered

Create: The Factory Must Grow

DEUF

Effect Tooltips

Entity Culling

Fast Leaf

FerriteCore

Food Effect Tooltips

Framed Blocks

Freecam

FTB Ranks

FTB Teams

FullStack Watchdog

Game Menu Mod Option

GJEB

Immersive Paintings

Inventory Sorter

Just Enough Professions

Kambrik

Krypton

Leaky

Let Me Despawn

Library Ferret

Macaw's Bridges

Macaw's Doors

Mouse Tweaks

Nature's Compass

Simple Voice Chat

Sound Physics Remastered

Storage Drawers

SuperMartijn642's

More Create Than you Could Ever Need