Of Ash and Fire by GinnyRULES
Rated: Professors [Reviews - 10]
Summary: Stranded in Tom Riddle's seventh year at Hogwarts, Hermione Granger is plagued by cryptic warnings from an intruder hidden somewhere in the school. Time is running out for her in more ways than one, as she attempts to return to her own time both to escape this mysterious threat, and the unavoidable allure of Riddle himself.
OLYMPUS by Indigo Cygnus
Rated: 6th-7th Years [Reviews - 12]
Summary: Dread is the only thing that goes through Ariel Sachs’ mind as he embarks on his last year at Hogwarts. A place he’s grown to hate. He has no plans and no hopes for the future. The only constants in his life are his loneliness and his crush on Christian Ackerman, the Ravenclaw stud. Ariel soon realizes that his plans to quietly survive his last year won’t work, when he gets caught up in the preparations of the first wedding to be held at Hogwarts. On the way, he will find support from a couple of unexpected characters and maybe, even, meet that someone he has been longing for his entire life.
Other Lives and Dimensions and Finally a Love Story by MoRoCcAnAnDpRoUd
Rated: 6th-7th Years [Reviews - 6]
Summary: The year is 1977, and the Wizarding World is in turmoil, but it doesn't really know it yet. A set of young wizards and witches in their last year at Hogwarts are only just figuring out their places in the world around them. They fall in and out of love whilst pledging their lives to the only thing that truly matters: fighting the darkest force that has ever struck their world. This is the story of the wizards' lost generation.
Other Side of Glass by teh tarik
Rated: Professors [Reviews - 10]
Summary: 
One Small Feeling by Theloonyhermione
Rated: 1st-2nd Years [Reviews - 1]
Summary: There was just one small feeling that got everybody up again after the war ended.
One More Night by xxbabewithbrainsxx
Rated: Professors [Reviews - 6]
Summary: Rose and Albus are forced to confront her changing relationship over the years, and Rose does not want to face the consequences.
This is babewithbrains of Ravenclaw writing for the Great Hall Valentine's Day Cotillion 2013.
One Week by Sly Severus
Rated: 6th-7th Years [Reviews - 2]
Summary: One week. Seven days. One hundred and sixty eight hours. It’s not much time. But what if that was all the time you could have with the one person you truly loved? One week out of the year. Would that be enough?
Of Misfits and Fighters by huff-slyn-dor-claw
Rated: 6th-7th Years [Reviews - 9]
Summary: AU. The Wizarding World according to blood purity rather than house. This story follows the life of a muggle-born genius, a mess-haired half-blood, a ginger blood traitor, and a struggling pureblood. In a world where they are pariahs, they are looking for a place to call home. And so begins a quest to find change within the systems of government and more importantly to find somewhere, anywhere, to belong.
Of Gnomes and Dark Magic by MetamorphmagusLupin
Rated: 3rd-5th Years [Reviews - 5]
Summary: AU. In an attempt to convince her father of the existence of magical creatures in their neighborhood, Zoe lets slip a bit of knowledge that Severus isn't happy about. Another "glimpse" and a continuation of my Severus and Zoe series of stories. This takes place in the summer following Christmas Eve Justice. It's highly recommended that you read the stories leading up to this one, but isn't necessary.
Of Wolf and Man by Padfoot11333
Rated: 3rd-5th Years [Reviews - 2]
Summary:
At the end, Remus reflects.
This was originally titled It's oh so quiet and was written in Secret Spew VII for the fabulous Sophie / The owl.
Out Of Reach by CanisMajor
Rated: 1st-2nd Years [Reviews - 13]
Summary: His mum's a witch and his dad's a wizard, but Phoenix isn't going to Hogwarts.
His parents have other plans, and they know their rights much better than
Vernon Dursley ever did. It all makes perfect sense to them -- but not to
their unhappy eleven-year-old son. The magical education authorities might
have an opinion, too, if anyone were asking them. Or is it just that no-one
is listening?
One Fateful Night by Gmariam
Rated: 3rd-5th Years [Reviews - 3]
Summary: Remus Lupin’s life is changed forever in one dark moment on Halloween night. Shock prompts bitter laughter, but reality brings sorrowful tears, as Remus struggles with the devastating loss of his best friends one fateful night.
One Sweet Night by Nagini Riddle
Rated: 1st-2nd Years [Reviews - 1]
Summary: In the midst of a dangerous world, James and Lily share one sweet night together.
Written for the Magic in Music challenge in the PA.
One Absolutely Beautiful Thing by BloodRayne
Rated: 6th-7th Years [Reviews - 54]
Summary: At age eleven, Dudley's daughter receives a letter he recognizes very well. As Sinead Dursley embarks on her journey of magical education at Hogwarts School of Witchcraft and Wizardry, she strikes up a strange friendship with Lorcan Scamandar. Soon, Lorcan and Sinead rule over a reign of terror at Hogwarts as they subject their fellow students to cruel and dangerous pranks.
The title of this story comes from the poem "Child" by Sylvia Plath. Also, I would like to thank Royari for being an amazing beta.
One, Two, Three by Alice Mac
Rated: 1st-2nd Years [Reviews - 4]
Summary: Have you ever been a part of something? I have - we were one, two, three together. Three pieces of a rather small jigsaw puzzle. But we were solid, strong and we felt untouchable.
Do you believe in 'forever?' I did. But then, I could be quite arrogant at times.
Oh Fred, you're dead! by KarasAunty
Rated: 3rd-5th Years [Reviews - 4]
Summary: A silly wee ode to poor dead Fred.
Out of the Woods by Alice Mac
Rated: 3rd-5th Years [Reviews - 2]
Summary: Before: Wife of a strong, powerful man, mother of a bright, beautiful son, lady of the Manor, proud, fulfilled, content, respected.
After: Wife of a weary, downtrodden man, mother of a scared, lost boy, slave, ashamed, miserable, afraid, disregarded.
It started with him and damn it all if I'll let him finish it too.
Overcoming by Kaitlyn Snape
Rated: 3rd-5th Years [Reviews - 1]
Summary: Ginny is torn apart by Fred's death. He was the only one of her brothers who understood her, and now he is gone. Yet despite this, she knows she must go on. She must continue to live despite this. And to live, she must accept his death, no matter how hard it is.
Summary: It was a cold October when hope was lost ...
Written for The Random Song Title Challenge in Poetry, Anyone over on the beta boards.
Of Babbling and Balls by Acacia Carter
Rated: 1st-2nd Years [Reviews - 4]
Summary: When he sees her, Colin's heart starts to race. And now he's got her all to himself for an evening - or at least he did.
This is Acacia Carter of Hufflepuff writing (again) for the Inaugural Great Hall Cotillion of 2012.