Humans:

Surprisingly one of the first races to take to the stars, they have built a considerable empire in the 170 years they have explored space. Making contact with several other alien races over that time, it was the humans who suggested the formation of a multi-species government, and successfully formed the Southern Galactic Arm Federation (S-GAF). Humans are considered to be an industrious species, but also a wasteful one, considering their home world Earth is very polluted and cluttered with debris. Still, humans have an admirable spirit, and have led the galaxy in times of peril justly and honorably.
K'yaSynth:

Standing at a staggering ten feet tall, they could only be described as a mysterious alien/machine hybrid that entered the galaxy from dark space three decades ago, and have never attempted to communicate with the other races. They were immediately identified as hostile, wiping out all ships and colonies they came across in a destructive blitz that nearly toppled the galactic governments. However, by uniting and putting aside their differences, the K'yaSynth were defeated and forced back into dark space. Today, travelling bands of their ships are encountered rarely, and usually swiftly destroyed.
Kin'ek'chi:
The Kin'eko'chi, which translates to the long path to becoming, are a breed of semi humanoids from a planet in the Alpha Centauri B system. They evolved on Dith'alla'om, which translates to eternal mother of all, a planet primarily covered in a mix of desert and savanna, with sparse jungles and small oasis's splattered around, from a branch species similar to a cross between earth primates and wasps (on their home planet their closest genetic relative is a species that is quintessentially a species of giant gorilla wasps).
For the most part they appear fairly similar to humans, with an adult height variation between approximately 1.3 to 2 meters. They have five major differences from your average human. The first being that their organ system has several redundancies, what human biologists call a tertiary organ system, meaning that while humans have one heart a Kin'eko'chi has three. The second major difference is in their eyes, they have two sets of compound eyes, covered in a tough crystalline like substance, and are capable of seeing into the infrared and ultraviolet spectrum. The third difference is their tissue, while it appears and feels similar to a humans it has a much denser carbon level, making it more durable. The fourth difference is the bone structure of their arms and the skin around their wrists. Kin'eko'chi have three bones in their arm, two that look and act almost identically to the human ulna and radius, however in-between these bones they have like object that can be pushed through a small puckered orifice on their wrists to reveal twin stingers about a foot and a half long, each filled with a venom whose strength varies on the individual Kin'eko'chi and their heredity as well as age and diet. The final difference from human beings is that Kin'eko'chi have a much different life cycle.
While human women produce an egg once each month, female Kin'eko'chi produce three eggs once every six earth standard years. The gestation period for the eggs varies based on the heredity of both parents though it tends to be somewhere between one and a half to three earth standard years, there have been gestations that lasted only a year and some that lasted up to five years. Kin'eko'chi are then considered children once born, having no infancy period. At the age of twelve they are out of adolescence and into an in-between stage the kin'eko'chi call kan'eko'chi'nii or the way on the path to being oneself. At this time Kin'eko'chi choose what course of study they wish to peruse, they then leave their families home to join a master at their temple to learn whatever task they have chosen to master. At the age of twenty they receive a ceremony call Eko'chi'eko'om, which translates to the path to being, the path to all. It is then that they are considered mature adults, and leave their masters temple.
Cradeenes:

Cradeenes are like humans meeting lizards. They are scaly and typically are colored with some sort of green. They are kind of short averaging about 5'3'' but have incredible muscles and flexibility which make them pretty good fighters. Their "S" sounds tend to hiss and their voices sound kind of echo-y. They are not very religious and tend to be meaner and colder than other species. Their species are quite common among the galaxy because they have high fertility rates.
Torros:

Torros are like minotaurs. Huge hulking masses with an average height of 7'4''. They are strong, durable, and very warm. Despite being hulking muscle, they actually have a pretty good intelligence and make contributes mainly in some of the life sciences. They are very religious following five different gods, each with their own purpose. Expect them to be kind and hospitable. Not very common among the stars due to a low birthrate.