Playable races on the planes include the following:
Aasimar: The glorious plane-touched scions of the celestials.
Bariaur: Centaur-like beings from the Upper Planes.
Genasi: Rare plane-touched beings with an elemental heritage.
Githyanki: Inheritors of a sprawling empire based out of the Astral Plane. (not currently playable)
Githzerai: A freedom-seeking, self-willed people from the chaos of Limbo.
Half-Elf: An offshoot of humanity barely different enough to raise an eyebrow.
Human: An adaptable and tenacious race that has spread throughout the planes.
Rogue Modron: A being of utmost law that has accidentally broken from its order.
Tiefling: The hard-edged and feared plane-touched descendants of the fiends.