TEC

TCA - modified TEC, with custom ships

Advent

Unity - modified Advent

Vasari

Dark Fleet - modified Vasari

The Galactic Empire - from Star Wars

The Rogue - Playable, custom pirates

The Arilou - UFO race from the Star Control Games

The Ur-Quan Korh-Ah - Death race from the Star Control games

The Atlantians - the ultimate race, the creators of all humanoid life forms (the gods)