Gundam 00 - I'm Home

A collection of six short stories originally serialised in Newtype and set between and after the first and second seasons.･ Where Earth and Sky Meet (June 2010)
(Where Emptiness and the Earth Meet/Where Space and Earth Meet)
A short focusing on Marina and the Celestial Being members following the second season finale.･ The second birthday (July 2010)
The confrontation between the two who bear the task of guiding humanity continues.
Secrets of the past, the motivations of the Innovators, and the motivations of Ribbons Almark... on the eve of "A Wakening of the Trailblazer", memories are stirring within Veda...･ Wanderer (November 2008)
Following the first season's finale Setsuna wanders the world and ends up in an Irish bar.･ I'm Home (March 2008)
In the wake of the first season's climactic battle Tiera struggles to comes to terms with what happened as he attempts to bring Celestial Being back together.･ Praise the Lord - Allelujah (2008)
After Allelujah finds himself imprisoned, his begins to think about his past.･ The Beginning Man (2008)
Lyle thinks back on his relationship with his brother and the reasons they separated years ago.

This series is drawn by Auto Taguchi and published by Kodansha.
In addition to this, according to Baka-Updates it is serialised in Magazine Z.
It shares its name with another Gundam 00 manga drawn by Kouzoh Ohmari and published by Kadokawa. 
The two series essentially follow the plot of the anime, however they vary both in artistic style and in the sequence of events that take place. 
The first volume was published on 17th January 2008, and at present the series has reached four volumes.
(Vol 2 - 2008/05/23; Vol 3 - 2008/08/22; Vol 4 - 2008/10/23)