This mod adds the Caldari graphical culture to Stellaris. It is standalone and compatible with all other mods.
Homeworld Ethics is 16 empire unique buildings that can only be built on an empire’s homeworld. Which can be built is based on the ethics of the empire.
There are a lot of mods out there that add new ships. Some I find quite good, others I find excessive (too many turrets, too much shield/armor/power).
Improved Space Battles (ISB) attempts to improve both the visuals and gameplay of ingame Stellaris’s space battles.
Have you ever wondered why all of the races in Stellaris have nearly identical military structure, form and ship technology level?