Dumbledore has requested Snape retrieve something valuable for the Order and stop Voldemort from getting his hands on it. Unfortunately Snape is also required to take Harry as they need a Parselmouth. Along the way, both learn more about each other and Snape's ideas and assumptions are proven incorrect.

Takes Place: 5th summer - Snape flavour: Snape is Angry, Canon Snape, Snape Comforts, Snape is Kind, Overly-protective Snape, Snape is Secretive
Tags: Injured!Harry, Kidnapped!Harry
Categories: Healer Snape, Teacher Snape > Trusted Mentor Snape, Teacher Snape > Professor Snape, Parental Snape > Guardian Snape, Teacher Snape > Unofficially teaching Snape

Hogwarts has enacted a house-exchange program in the interest of increasing inter-house unity and understanding. Students fourth year and up can visit other houses for two weeks if they sign up. Harry has a morbid curiosity about what it might have been like to be sorted into Slytherin.
In Response to the House Exchange Program prompt by JAWorley.

Takes Place: 6th Year - Snape flavour: Snape is Angry, Canon Snape, Snape Comforts, Snape is Mean, Snape is Stern
Tags: Hufflepuff!Harry, Injured!Harry, Ravenclaw!Harry, Resorting, Slytherin!Harry
Categories: Healer Snape, Teacher Snape > Professor Snape

Harry Potter and Mark Evans hung onto each other for dear life in Little Whinging. For three years Harry worried about leaving Mark behind when he left for Hogwarts, and when Mark discovers he’s a wizard, and that Harry’s one too, he finally gets the chance to repay Harry for all the kindness showed him.

Takes Place: 5th summer, 5th Year - Snape flavour: Snape is Angry, Canon Snape, Snape Comforts, Snape is Kind, Snape is Loving, Snape is Mean, Snape is Stern
Tags: Adoption, Alternate Universe, Injured!Harry, Sibling Addition
Categories: Healer Snape, Snape Equal Status to Harry > Foes Snape and Harry, Teacher Snape > Professor Snape, Parental Snape > Guardian Snape

Before Harry arrives at Hogwarts, the faculty have a meeting and decide that Harry will need a mentor to help him adjust, keep him out of trouble, and make protecting him easier. They decide that this person should the Head of the House into which Harry is sorted, presumably Minerva McGonagall. But things, of course, don't turn out as planned, and Harry is harder to deal with than anyone expected. Nobody asked him if he wanted a mentor, after all...

NOTE: This story has a prologue. It is not necessary to the plot of the story, but if you wish to read it, it is called(predictably enough) 'Prologue to Life as Dictated by a Talking Hat'

Takes Place: 1st Year - Snape flavour: None
Tags: Alternate Universe, Slytherin!Harry, SuperPower! Harry
Categories: Teacher Snape > Trusted Mentor Snape, Parental Snape > Guardian Snape

On Christmas Eve, an unwanted child is left in a manger and found by a young Potions Master, changing both their lives forever. AU, implied child abuse, neglect, possible CP, Sev raises Harry.

Takes Place: 0 - Pre Hogwarts (before Harry is 11) - Snape flavour: None
Tags: Adoption, Alternate Universe, Baby fic, Child fic, Runaway, Slytherin!Harry
Categories: Parental Snape > Guardian Snape