Harry Potter has been banged up for ten years in the hellhole brig of Azkaban for a crime he didn't commit, and his traitorous brother, the not-really-boy-who-lived, has royally messed things up. After meeting Fate and Death, Harry is given a second chance to squash Voldemort, dodge a thousand years in prison, and snatch everything his hated brother holds dear. H/Hr/LL/DG/GW.

Harry has the ability to learn the history of any object he touches, whether he wants to or not.

Harry Potter is not standing up in his crib when the Killing Curse strikes him, and the cursed scar has far more terrible consequences. But some souls will not be broken by horrible circumstance. Some people won't let the world drag them down. Strong men rise from such beginnings, and powerful gifts can be gained in terrible curses. (HP/HG, Scientist!Harry)

A different upbringing leaves Harry Potter with an early knowledge of magic and a view towards the Wizarding World not as an escape from the Dursleys, but as an opportunity to learn more about it. Unfortunately, he quickly finds that there are many elements in this new world that are unwilling to leave the Boy-Who-Lived alone.

Sirius decides to stay in England after escaping Hogwarts and makes protecting Harry his priority. AU GOF.

The escape of Peter Pettigrew leaves a deeper mark on his character than anyone expected, then comes the Goblet of Fire and the chance of a quiet year to improve himself, but Harry Potter and the Quiet Revision Year was never going to last long. A more mature, darker Harry, bearing the effects of 11 years of virtual solitude. GoF AU. There will be romance... eventually.

Petunia married a biochemist, and Harry grew up reading science and science fiction. Then came the Hogwarts letter, and a world of intriguing new possibilities to exploit. And new friends, like Hermione Granger, and Professor McGonagall, and Professor Quirrell... COMPLETE.