If you're looking for manga similar to Code-E, you might like these titles.
In 1999, asteroids bombard the earth and the world is plunged into chaos. From the ashes, a new society arises where only the strong survive. In this society, scientists give the elite superpowers, while the weak are left at their mercy. These elites rule the world with an iron fist. In 2020, two heroes rise up to battle the injustice of the elite and restore peace. They are known as Mega Dragon and Tiger.
Yoi, a girl who has nowhere to go because she looks different from the people around her. Who reached out to her...?
9S is set in an age of science, but in a too distant future. The Mad Scientist, Mineshima Yujiro, dissapeared several years previous to where the story begins. The inheritance he left behind, the technology and objects he had created, were given the codename 'Legacy', and are highly sought after by government agencies and terrorists, for reasons both good, and...not so pleasant. One of these 'objects' he left behind was his daughter, imparted with a mental calculating capacity that dwarfs supercomputers, combined with her physical body, which makes for a devastating combination.
One night, Michio chases a UFO to see where it lands. He is taken inside it and encounters a mysterious baby, Ultra B. Soon reveals that he has superpowers when he moves in with Michio's family.