There are several factions in the new galaxy. The three main ones can be found in the nav bar to the left. They are the System Alliance, the Tektron, and the Blacktron.
Other factions are mysterious and elusive races who don't make much of an appearance in the New Galaxy. The Technic Giants, for example, have sworn themselves to be only observers of the events that take place, but they have been known, from time to time, to alter the course of history for good.
The UFO, or the United Farrollans of Ogoz, are a violent alien race who once teamed up with the Tektron to defeat the SA. However, they betrayed the Tektron and turned their superweapons on the Tektron so that they could rule the galaxy alone.