If you're looking for manga similar to Code Geass: Lelouch of the Re;surrection, you might like these titles.
A three-man team of Martian-based Coordinators led by Agnes Brahe commands the Acidalium. The trio gets involved in the second EA-ZAFT War as Agnes controls the Voiture Lumiere-based mobile suit known as the GSF-YAM01 Δ Astray.
In A.S. 106, Five years after the "Vanadis Incident" which denied all Gundams, those cursed Mobile Suits are now roaming the earth.
Leif Recitativo was ordered by Veda to gather a group of living bio-terminals called Innovades. But members of Celestial Being's shadow group Fereshte (which is now disbanded and rejoined the main organization) reappears.
In 1945, at the close of the Pacific War, an invasion beset the planet Earth. Droves of Phantom Beasts - aliens from another world - landed and waged war against man. Humanity was forced to unite and fight this common threat, but years later, in present times, the death toll has depleted the military forces, leaving Japan with no choice: They must enlist the help of teenagers. Atsushi Hayami is among those who, rather than lead a normal high-school life, must take up arms to ensure the survival of mankind.
Several thousands of years from now there is the Joker Galaxy of five Star Systems, where there is a long, long war being fought. The god of light, Amaterasu, is trying to unite the galaxy under his rule. The fighting stands between giant mecha called Mortar Headds, their pilots, the Headdliners, trained since birth for their task and the female humanlike computers called Fatimas, necessary for controlling the MH. Many are the lives and destinies found throughout the more than thousand year long era of war, although Amaterasu seems to live through it all.