Improved Space Battles – Micro Jump adds the ability to jump ships over a short distance during combat.
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).
Have you ever wondered why all of the races in Stellaris have nearly identical military structure, form and ship technology level?
Crystallis Ship Modules Expansion Mod adds 29 new ship modules and technologies. All modules come from RARE technologies.
Do you ever wanted a Science Ship for late Game, which can deal with filthy aliens on its own?