Darkness beyond twilight; Crimson blood that flows.
Buried in the stream of time is where your power grows.
In thy great name I pledge myself to conquer all the foes who stand
Before this mighty gift bestowed in my unworthy hands.
Let the fools who stand before us be destroyed by the power you and I possess:
Fuzzy Logic by Deritine (Naruto). If you're bored of the same canon plot and characters done over and over, and don't mind crack, read this. (Time Travel done right.)
Seventh Horcrux by Emerald Ashes (Harry Potter). See the world of Harry Potter through a rather unique perspective. If you want a more lighthearted reinterpretation of canon, and don't mind crack, read this. (The presence of a foreign soul may have unexpected side effects on a growing child.)
Naruto, Master of Seals by DisobedienceWriter
DisobedienceWriter is probably my favourite author, with (currently) 27 stories, almost all of them complete, and all of them well-written and clearly labeled.