Title: Browncoat, Green Eyes
Author: nonjon
Rating: M (though really T)
Category: General/Action/Adventure
Crossover: Firefly/Serenity
Summery: WIP. [Firefly-Harry Potter crossover] Post-Serenity. Two years have passed since the secret of the planet Miranda got broadcast across the whole ‘verse in 2518. The crew of Serenity finally hires a new pilot, but he’s a bit peculiar.
Link: http://www.fanfiction.net/s/2857962/1/

 

Title: Fighting the Gods
Author: phoenix catcher
Rating: T
Category: General/Action/Adventure
Crossover: SGC/SG-1
Summery: Harry leaves Earth at the age of 7, learns a different type of magic and with the knowledge and technology of ancient races helps the SGC and SG1 to defend the galaxy from the Evil Goa'ulds.
Link: http://www.fanfiction.net/s/2994996/1/

 

Title: Sanctuary of Arda
Author: Keiran Halcyon
Rating: R
Pairing : Harry/hawt elf girl
Crossover: Lord of the rings (set way before the books)
Summary:
Harry is desperate after the events at the Ministry and the subsequent revelation of the Prophecy. He cannot imagine how he could even begin to fulfill it in the next two years. But when an opportunity to solve that problem arises, he takes it with arms wide open.
Link: Yahoo group

 

Title: HP & The Dying Embers
Author: Kalistar
Rating: T
Summary: AU Star Wars Crossover. Harry Potter was attacked by Voldemort, however, his parents were not home and he was taken fromhis home and Earth by an old Jedi to grow up as Revan a powerful and influential Jedi. Follow as Harry descends into darkness and struggles to redeem himself. Dark!Harry eventual SithLord!Harry
Link: http://www.fanfiction.net/s/2861773/1/

 

Title: It’s All Relative on the Hellmouth
Author: dellacoeur
Rating: T
Crossover: Buffy the Vampire Slayer
Pairing: (eventual) Harry/Buffy
Genre: Action/Adventure/Angst
Summary: Harry Potter finds a new relative in Sunnydale. PostVoldemort, Harry needs a distraction. Hope Uncle Rupert can help a powerful Harry before the power takes control.

Link: http://www.fanfiction.net/s/2985538/1/

 

Title: Family Values
Author: Ishtar
Rating: Everyone so far
Genre: Alternate
Pairing: None so far
Status: WIP
Summary: Aunt Petunia gets rid of baby Harry by sending him to relatives in the United States. Relatives who turn out to be somewhat ... unusual. AU, Xover with The Addams Family.

link: http://ishtar.fanficauthors.net/Family_Values/index.php

I have really enjoyed this fic. I know Ishtar isn't very "popular" on this forum, but I think she's a hell of a writer. This fic is top notch in my opinion, and for me its between Nonjon's fic, and this. I like this a great deal.

 

Title: Harry Potter and the Joining of Destinies
Author: Kalistar
Rating: T
Genre: Action/Adventure/Drama
Pairing: None so far
Status: Completed (Sequel is WIP Harry Potter and the Return of the Dragon)
Summary: AU WoT Crossover. After the end of GoF, Harry is transported to another time. Thinking he can never return home, Harry finds family and learns new skills that will prepare him for his eventual fight with Voldemort. Will feature Independent!Harry, Power

link: http://www.fanfiction.net/s/2731428/1/

I really like WoT, probably the only world I like more then HP. But beside that I think this fic is really quite good. It isn't hard to understand even if you don't read Wheel of Time, the writing is solid, and it affords a good chance for Harry to gain power and be away from the HpVerse while providing good story for the War at that time in Wheel of Time. When Harry does return to HpVerse the story does a good job of showing how much he's changed from his friends.