There are plenty of mods available for StarMade.
You can find them here.
The most popular mods and a brief summary of each: (based on downloads)
- Firey Balls of Fire
Makes stars look a lot more realistic
A multipurpose tool, allowing 3D file imports and blueprint modification
A redesign of the UI, giving it a nice, holographic feel
- Immersive Blocks
Adds new blocks and hulls, like teleporters, force field blocks, and more
- Larger Thruster Plumes
Shader that brightens, lengthens, and enlarges thruster plumes