We all know of the Green Lantern Corps, and now the Sinestro Corps, consisting of Sinestro (which has been the total opposition of the GL Corps since Sinestro first gained his Yellow Power Ring) and a cadre of various familiar DC villainous faces. But now there have been other, various colored, Corps' showing up throughout the Sinestro Wars, GL and GL Corps comics. The following is a listing of the multiple Corps in the "War of Light" and the Prophesized "Blackest Night" storylines. Along with links to each of the Corps' web pages.
This is what was told to the Earth Lanterns (Hal, John, Guy and Kyle) by the Guardians concerning the “Blackest Night” prophecy - The two existing Corps would be joined by five new ones, each driven by a specific emotion and empowered by a specific color of the emotional spectrum, leading to an all-out war that would end up destroying the universe.
Green Lantern Corps - Hal Jordan and crew are always up for a fight. And since the events of the Sinestro Wars, they have lost many, and gained many more, members.
They have also been given the authority to use lethal force against Sinestro and his crew. Niiiiice. Main players being Hal Jordan, John Stewart, Guy Gardner, Kyle Rayner, Kilowog, and a slew of both new and old corps members.
http://en.wikipedia.org/wiki/Green_Lantern_Corps
Sinestro Corps - Founded by Sinestro in an attempt to destroy the Green Lantern Corps which he was once a prominent member of, and who leaders, the Guardians, expelled him and sent him to the Antimatter universe of Qward, where he found the Qward Weaponers and their weapons powered by Yellow energy. His ranks have grown substantially and included the likes of the Anti-Monitor, Superman-Prime, Cyborg Superman, Despotellis, Parallax, Amon Sur (Abin Sur's son) and Bizarro Yellow Lantern.
http://en.wikipedia.org/wiki/Sinestro_Corps
Now, those have been the main 2 factions in this war of colors thus far, but now, there are new additions to the fray, leading up to the eventual "War of Light" these include:
Red Lantern Corps - Founded by Atrocitus of the 5 inversions, the 5 survivors of the Space Massacre of sector 666, this Corps is powered by the Red Spectrum of light and the power of Rage. The first Red Ring being born out of the crystallized blood of the inversions themselves. The Ring replaces the heart of its bearer, spoiling their blood, and expelling it from their bodies in violent vomiting. Atrocitus formed the Red Power Battery from a lake of his own expelled blood, and from this Battery emerged new Lanterns and Rings to find new hosts. Next to Atrocitus, Laira (a former GL expelled for the murder of Amon Sur) is the first to be inducted into the Red Lantern Corps. Their purpose is to destroy Sinestro. It is said this group will usher in the "War of Light".
http://www.comicvine.com/red-lantern-corps/65-50747/
Orange Lantern Corps - The Orange Lanterns are powered by avarice, or greed. The Controllers (an offshoot of the Guardians) are seeking the Orange Light of Avarice in the Vegan Star System. The bearers of Orange rings possess a much deeper aura than other Corps's members, and it is said they steal the rings of other Corps' as well.
http://www.comicvine.com/orange-lantern-corps/65-50745/
Blue Lantern Corps - The Blue Lantern Corps rings are powered by Hope. They were created by the Guardians Ganthet and Sayd out of their Hope for the future. The Blue Power Rings are capable of energizing other Corps' rings. The first member is Saint Walker, sent by Ganthet and Sayd to help Hal and fellow lanterns in keeping Sinestro from falling victim to the Red Corps.
http://www.comicvine.com/blue-lantern-corps/65-50163/
Indigo Lantern Corps - The Indigo Lantern Corps do not wear rings, but instead, wield Staff-like Lanterns made up of Coral-like material. They resemble shamans and do not wear uniforms, but instead tattoo their bodies with the symbol of their Corps, and are powered by compassion.
http://dc.wikia.com/wiki/Indigo_Lantern_Corps
Violet Lantern Corps - The Violet Lanterns are Zamarons (female offshoot of the Guardians) and are powered by Love. When 2 beings were deeply in love, they met their deaths in loves embrace, and through their final act of love they managed to open a channel into the Violet emotional spectrum, crystallizing and entire planet. The Zamarons came to this planet and used these crystals (Star Sapphires) to give spurned lovers the ability to enact vengeance on their former lovers. They realized, when the Sinestro Corps was created, that the "Blackest Night" Prophecy would indeed come to pass. So they fashioned a central power battery out of the Crystals and created Rings and a Corps of their own. Once a bearer was found, the Rings would encase them in crystal, awaiting their new role.
http://www.comicvine.com/violet-lantern-corps/65-50744/
Black Lantern Corps - During the events of the Sinestro Corps Wars, a member of the Sinestro Corps, The Anti-Monitor was hurled into deep space by Superman Prime who was enraged at the loss of the war. Battered and damaged, the Anti-Monitors Body shriveled, and eventually landed on dark, barren planet that started to envelop him and as he was powerless to stop it due to the damage suffered in the war, he was fully enveloped, and this created a Black Lantern Power Battery. The Black Lantern Rings are able to re-animate the dead, thus, the Black Lantern Corps is composed of the re-animated corpses of the dead in the DCU! The symbol for the Black Lanterns is the same symbol worn by former Hal Jordan enemy, Black Hand. It is speculated as this being the return of that character to the DCU.
Can you guess as to which “dead” will come back?
http://www.comicvine.com/black-lantern-corps/65-50743/