JEI integration - A must have for any mod pack show you all the items that are in the modpack and all the ways to craft them and a trashcan function so you can throw away useless items instead of dropping them on the ground or in lava.
Railcraft - offers a multitude of rails and a routing system to build advanced railways.
the mod also changes the way you craft rails so you have to spend more time and resources to craft them.
Journey map - minimap that helps you find your way around the world and shows you your waypoints in the world and the distance you are away from them. also shows you your point of death.
The one probe - Shows you what item you're looking at and what mod it's from on your HUD and is configurable with a few in-game items.

