Tranquility Corpus
A neutral civilization, slowly evolving from a naturally-occurring phenomenon of silicate piezoelectric cells that formed a singular conciousness on their homeworld, the Primary. Over the millenia, they developed machines that were parts of their own conciousness, and have recently started galactic colonization. They value technology above all else, and are dedicated to the idea of spreading their Enlightenment for the good of the galaxy. They hold no special regard for life in the universe, but use deadly force only as a last resort.
The Burning Ones
Coming from the planet Cinders in the Fireball system, the Burning Ones are a warrior race of religious zealots. Disciples of the Flame God, they will stop at nothing on their way of consuming the galaxy in the Bright Flame. Their leader, Firelord, is an agressive tactitian who uses the most of his vast military. They know not of diplomacy or trading, prefering to take what they want. The first race that made contact with the Burning Ones, the Altarians, have been put to the Bright Flame within a month of the initial contact. Their ships may be technologically weak, but the Burning Ones more than make up for it with their numbers, zeal and agression.
Iron Tribunal
In 2103, after abolishment of the death penalty, humans opted to send their undesirables to the stars, in huge vessels that would take them as far from Earth as possible. One such ship, the Freedom Rykers, was sent to the distant system of Judacaria with almost sixty seven million people. Over the 100-year voyage to the system, the occupants, now the descendants of the original prisoners, have made a dramatic change. Instead of crime, they have begun to value justice and righteousness. Within 30 years of landing on the planet Terra Nova, the society was thriving, a perfect community of nearly a two hundred million with no crime, wars or sins. And now, they turn to the stars, realising that it is time to make the galaxy a just and righteous place.
Eilathans
Overpopulation, polution and consumption of all the natural energents have made the three most powerful nations of Eilathoria war against each other for resources. After dozens of years of war, the planet was reduced from a once higly developed world into a badland, with severe winters on the poles and scorching winds sorrounding the equator. The now class 2 world has finally reached a state of peace, since none of the warring factions have any means to fight. In desperation, each of the factions have focused the very lasts remnants of technology to create three massive space-faring vessels, ships that would ensure the survival of the Eilathan race. It wasn't long after the initial colonizations that the Eilathans turned to war again, but this time, the enemy was the galaxy.
There are a couple more, but not as well-made as these. I enjoy RPing