EB Prepare Carefully - lets you setup the game before hand. tweak skills and items before world gen. I highly recommend installing it, even if you don't use it in the menu options. Note: it doesn't change gameplay, just setup.
More Floors - makes the game less boring to look at
Feed The Colonists - adds an option to make 4X meals instead of 1X meals, doesn't change how many resources are used, just lets you make 4 meals at once.
More Furniture - makes the game less boring to look at, and offers a few pieces that add some perks to bedrooms.
Rim Fridge - adds friges. honestly this should be in the stock game.
RT Fuses - adds a fuse part to the game so electrical shorts don't just blow your shit up.
Infused - makes raiders drop infused items (items with bonuses).
Basic Bridges and Fishing addon - adds bridges, and fishing, and meals made from fish.
Advanced Power Generation - late/end game power options
Expanded roofing - new roof types
Dinosauria - adds dinosaurs.
Realistic Rooms - reduces room size requirements
Misc. Training - adds more training items in the joy category.
Tilled Soil - makes it so you can reclaim soil and improve soil.
Expanded Prosthetics and Organ Engineering - just like the name implies.