The Exodar: The Exodar is the capital of the draenei in Azeroth, made up of the draenei who followed their Prophet, Velen. Velen led a raid on the naaru fortress of Tempest Keep and stole the Exodar, one of its satellite structures, from Kael'thas Sunstrider. The Exodar draenei joined the Alliance because of their common faith in Light and because they have little love for two of the Horde's races - orcs (primarily because of their genocidal campaigns in the past) and blood elves.
The Aldor: The Aldor is an order of draenei priests that were acolytes of the Prophet Velen. They survived the destruction of Shattrath City and remained in hiding until the arrival of A'dal. Today, they are led by the High Priestess Ishanah and reside at the Aldor Rise, where they try to serve the naaru. They're at odds with the Scryers, a group of blood elf defectors from armies of Prince Kael'thas, due to their origins, and compete with them for the favor of the naaru.
The Sha'tar: "Sha'tar" - "born from light" - is usually used to refer to the naaru masters of Shattrath City. However, the majority of their military are draenei. In addition to standing guard in Shattrath, there is a Sha'tari Base Camp near Auchindoun, where the soldiers of the Sha'tar battle against the demonic and undead forces of the Bone Wastes. Their leader is the naaru A'dal.
The Auchenai: The Auchenai are the only known group of "evil" unmutated draenei. Known also as death-priests, the Auchenai appear to have been corrupted by the void energies of the dead naaru D'ore, and practice necromancy and warlock magics. They are led by Exarch Maladaar.
Kurenai: This group of Broken, whose name means "redeemed", have attempted to re-establish contact with their "pure" cousins from the Exodar. They are enemies of the Horde, much like the majority of their race. Their home ground is the city of Telaar in Nagrand; their other major outpost is the Orebor Harborage in Zangarmarsh.
Ashtongue tribe: The Ashtongue is the faction of Broken in the service of Illidan Stormrage. They are the most evil tribe of Broken and their leader, Akama, is considered to be the most evil traitor against the draenei people. These Broken were handpicked by Akama himself to maintain his evil facade with Illidan Stormrage.
Ashtongue Deathsworn: The Ashtongue Deathsworn are Akama's personal guard, they are a subdivision of the tribe that know Akama's true intention. They are seeking adventurers to aid their master for the final battle against Illidan.