"I've seen a lot of boys go to war, and not all of them have returned. So many have left without a chance for me to say goodby that you'd think it would be impossible to keep track of. I've never forgotten the name of a single one of them. Because I can't. And I consider that a privilege."
Users can remember great volumes of information, in greater detail and for much longer than the average human, they can read books, listen to song lyrics, encounter people or experience events and recall a vast deal of the details of their experience. In addition, it takes less effort to recall the information they encounter, and they can remember it for longer without having to strain. Their memory is also more resilient against Memory Manipulation.
Rei Ogami (Code:Breaker) remembers every person he ever killed.
Broly (Dragon Ball Z: Broly the Legendary Super Saiyan) was able to recall Goku's appearance and birth name, even though he hadn't seen Goku since they were infants.
Possessing a photographic memory, Kenshirō Kasumi (Fist of the Blue Sky) read through a five-book set and wrote down the exact contents on his notebook in an instant.
Rufus (Fairy Tail) using Memory Make.
Solf J. Kimblee (Fullmetal Alchemist) possessed a photographic memory, as he never forgets a person's face, mostly the faces of his victims.
Vinsmoke Reiju (One Piece) has a photographic memory since three years old.
Patch (101 Dalmatians II: Patch's London Adventure) was capable of remembering all 72 episodes of his favorite show.
Even without the Omnitrix and Ultimatrix and despite not studying magic, Ben Tennyson (Ben 10) was able to memorize a complex series of complex magical runes/symbols after one glance. Even one of his future self Ben 10,000 remembered everything from his past timeline, which creeped Kevin out.
Lex Luthor (DCAU) has a great photographic memory, in that he was able to memorize the AMAZO's blueprints after reading them once, created a cannon that could destroy AMAZO, and later on recreating an android of the same design for himself to gain godhood.
With his mental powers, Brother Blood (Teen Titans) can retain complicated information indefinitely within his memory, like the private blueprints of Cyborg's technology and all of his inventions.
Ingrid Third (Fillmore!) has a Photographic Memory
Fiona Fox (Archie's Sonic the Hedgehog)
Unlike other speedsters, Bart Allen/Kid Flash (DC Comics) has a true photographic memory as he can permanently remember everything he has ever read, seen or heard.
Since his childhood, Tony Masters/Taskmaster (Marvel Comics) could memorize a person's exact movements and replicate them perfectly.
Sage (Marvel Comics)
Steve Rogers/Captain America (Ultimate Comics) never forgets anything no matter how much information he receives.
Severus Snape (Harry Potter)
Sherlock Holmes (Sherlock Holmes)
Ella's (Riordanverse/Heroes of Olympics) memory is unusual for a harpy; she can remember anything she has read or heard and speaks multiple languages.
Sheldon Cooper (Big Bang Theory) can remember his own birth.
Gibson Kafka's (Birds of Prey) perfect photographic memory contains every taste, sight, sound and smell he has ever experienced (since before birth) and knows, to the second, the amount of time that has passed since he last saw someone.
Max Guevara (Dark Angel), one of the X5s.
The Doctor (Doctor Who) can recall any moment or event of his 2,100 year life in explicit detail.
Charlene "Charlie" Andrews (Heroes) easily remembers the complex contents from one of Hiro's Japanese books after seeing it only once.
JJ Powell (No Ordinary Family) claims to remember for approximately 6 hours, but managed to overcome its limits.