The 'standard' Imperfection suite. All but the most annoying and/or extreme aspects are included.
Collections of mods with tweaks to make them work together.
Transportation of the player, be it vehicles or teleporters.
Augmented or new ways of transporting materials - belts, inserters, pipes!
Map generation and terrain modification.
New Ores and resources as well as machines.
Things related to oil and other fluids.
Furnaces, assembling machines, production chains.
More than just chests.