Many of the attractions are open during extra magic hours. Here is a full list of open attractions, from the Disney World web site's FAQ list...
Magic Kingdom Theme Park
Buzz Lightyear's Space Ranger Spin, Cinderella's Golden Carrousel, Dumbo the Flying Elephant, "it's a small world", The Many Adventures of Winnie the Pooh, Mickey's PhilharMagic, Peter Pan's Flight, Space Mountain, Stitch's Great Escape!, Tomorrowland Speedway
Includes attractions listed above and Big Thunder Mountain Railroad, Haunted Mansion, The Magic Carpets of Aladdin, Pirates of the Caribbean, Splash Mountain
Living with the Land, Mission: SPACE, Soarin', Spaceship Earth, Test Track
Includes attractions listed above and Honey, I Shrunk the Audience, Journey Into Imagination With Figment, Mexico - Gran Fiesta Tour Starring The Three Caballeros, Norway-Maelstrom, The American Adventure
Disney's Hollywood Studios
Muppet Vision 3-D, Rock 'n' Roller Coaster Starring Aerosmith, Star Tours, Toy Story Mania!, The Twilight Zone Tower of Terror
Includes attractions listed above and The Great Movie Ride, Voyage of The Little Mermaid
Disney's Animal Kingdom Theme Park
DINOSAUR, Expedition Everest, It's Tough to be a Bug!, Kilimanjaro Safaris, Pangani Forest Exploration Trail
DINOSAUR, Expedition Everest, Festival of the Lion King, It's Tough to be a Bug!, Kali River Rapids, Primeval Whirl, TriceraTop Spin
Attractions are subject to change without notice.