Yuuzhan Vong
The Yuuzhan Vong are a fictional race of sentient beings created as a threat for the New Republic in the Star Wars New Jedi Order series of novels.
The Vong are a race of religious zealot masochists. They genetically engineer and grow all of their organic technology and view mechanical technology as blasphemy. They endeavor to improve their physical capabilities through organ grafts from other species. The Vong function in a caste system, and those higher up in position have more body modification and mutilations.
Their economic system isn't really mentioned, but appears to be a command economy.
Proving the extent of their might, the Yuuzhan Vong were able to conquer Coruscant and renamed it Yuuzhan'tar. They adjusted the orbit of the planet and attempted to teraform it into their ideal world. However, the invasion was defeated and the Vong were forced to withdraw.
The cost of the actions of the Yuuzhan Vong was very dear to the galaxy. The number of deaths over the known galaxy that resulted from the invasion was estimated at about 360 trillion individuals. That would be equal to 60 thousand worlds with population of 6 billion each.
Technology
The Yuuzhan Vong (Sometimes incorrectly abbreviated Vong, as this implies insult) use only living ships and weapons. Some of the weapons that they use are listed below.