Hydrogen fuel, for all your needs.
Providing the player with new tools or adjusting the game interface, without fundamentally changing gameplay.
Things related to oil and other fluids.
Changes to power production and distribution.
Experimental overhaul mod build on top of Freight Forwarding.
Large total conversion mods.
Transportation of the player, be it vehicles or teleporters.
Augmented or new ways of transporting materials - belts, inserters, pipes!
Trains are great, but what if they could do even more?
New ways to deal with enemies, be it attack or defense.
Armors or armor equipment.
Changes to enemies or entirely new enemies to deal with.
New Ores and resources as well as machines.
Furnaces, assembling machines, production chains.