Factorissimo 2 adds factory buildings to Factorio. Place them down, walk in, build your factories inside!
Mods introducing new content into the game.
Augmented or new ways of transporting materials - belts, inserters, pipes!
Things related to oil and other fluids.
More than just chests.
Factory bug: teleportation.
When you fly over a factory entrance through the map, you're teleported into it. It would be fine if this only worked on one planet, but you can teleport between all planets.