Freeze water into ice. Enclose items in ice to slow spoiling. Store spoilables in a refrigerator to stop spoiling completely. Fridges draw power based on ambient temperature. Also adds cooled wagons.
Mods introducing new content into the game.
Augmented or new ways of transporting materials - belts, inserters, pipes!
Things related to oil and other fluids.
Furnaces, assembling machines, production chains.
More than just chests.