Adds compressed items, buildings and recipes that uses compressed items.
Mods introducing new content into the game.
Transportation of the player, be it vehicles or teleporters.
Augmented or new ways of transporting materials - belts, inserters, pipes!
More than just chests.
In your description you stated that this mod did not require any other omni mod. However, the mod does list "omnilib" as a required dependency. Even if it's just a library that does nothing on its own, its still a separate mod.
Omnicompression uses functions from omnilib.