Big Engineering adds Create, Immersive Engineering, Mekanism, and several other mods(Look in the list below). The slew of mods allows for an industrialization of your world, and modifying it to have similar architectural features of real life, like powerlines and cars, even futuristic things like the Meka armor from Mekanism. Being similar to the power armor from the Fallout videogams series. It is a very strong and powerful set allowing for modules like a jetpack and elytra combination allowing for Ironman flight capabilites. The Create mods add the capabilites to mechanicalize all of the vanilla farms that you would normally make like an Iron farm. Example being that instead of Iron Golems you would automate a cobblestone farm and link that to a crushing system that would have the items drop onto a belt and get washed by water and fans allowing for Iron nuggets and flint. Finally the Immersive Engineering mod adds more power systems like a diesel engine making a lot of power but requires a refiner to make the diesel to make the diesel engine run. Big Engineering adds many things to do with Engineering and infrastructure.

Mods:
Create

Create: Armory
Create: Misc & Things

Create: Teleporters
Create: Cafe

Create: Central Kitchen

Create: Compats
Create: Confectionary
Create: Crafts and additions

Create: Deco

Create: Decoration Casing

Create: Enchantment Industry

Create: Gourmet

Create: Guardian Beam Defense

Create: Infernal Expansion

Create: Mechanical Extruder

Create: Ore Additions

Create: Ore Excavation

Create: Planetary Tweaks

Create: Sabers

Create: Sifting

Create: Stuff & Additions

Create: Train Additions

Create: Weaponry

Create: Alloyed

Create: Biofuel

Create: Broken Bad

Create: Buffer & Beams

Create: Diesel Generators

Create: Dreams & Desires

Create: Electrical Stonks

Create: Electric Trains

Create: Liquid Fuel

Create: Modern Train Parts

Create: Steam N' Rails

Create: Structures

Create: The Factory Must Grow

Create: Gear

Create: Sleepable

Immersive Engineering

Immersive Aircraft

Immersive Weathering

Farmer's Delight

Farmer's Respite

Italian Delight

Macaw's Series

Mekanism

Mekanism: Generators

Mekanism: Armor

Mekanism: Tools

And More!(WIP)