Elseworlds

all include the Elseworlds logo except where noted

All Star Batman and Robin, the Boy Wonder (the "All Star" imprint is clearly outside of continuity)
All Star Superman (the "All Star" imprint is clearly outside of continuity)
Batgirl and Robin: Thrillkiller
Batman / Dracula: Red Rain
Batman / Houdini: The Devil's Workshop
Batman and Batgirl: Thrillkiller '62
Batman: Bloodstorm
Batman: Book of the Dead
Batman: Brotherhood of the Bat
Batman: Castle of the Bat
Batman: Crimson Mist
Batman: Dark Allegiances
Batman: Dark Joker, the Wild
Batman: Dark Knight Dynasty
Batman: Dark Knight of the Round Table
Batman: Detective No. 27
Batman: Digital Justice (unlabeled)
Batman: Gotham by Gaslight
Batman: Gotham Noir
Batman: Haunted Gotham
Batman: Hollywood Knight
Batman: Holy Terror
Batman: Knight Gallery
Batman: League of Batmen
Batman: Manbat
Batman: Masque
Batman: Master of the Future
Batman: Nine Lives

Batman: Scar of the Bat
Batman: The Blue, the Grey, and the Bat
Batman: The Dark Knight Returns (unlabeled, but published before "Elseworlds" was created)
Batman: The Dark Knight Strikes Again (unlabeled)
Batman: The Order of Beasts
Bizarro Comics
Bizarro World
Catwoman: Guardian of Gotham
Flash: Flashpoint
Green Lantern: Evil's Might
I, Joker
JLA: Act of God
JLA: Age of Wonder
JLA: Destiny
JLA: League of Justice
JLA: Riddle of the Beast
JLA: Shogun of Steel
JLA: The Nail
JLA: The Secret Society of Superheroes
JSA: Golden Age
Just Imagine Stan Lee's Batman
Just Imagine Stan Lee's Catwoman
Just Imagine Stan Lee's Robin
Kingdom Come
New Frontier
Robin 3000
Superman: Last Stand on Krypton
Superman: Speeding Bullets

Superman: True Brit

Tangent Comics (unlabeled - now conisdered part of the post-Infinite Crisis multiverse)

Cross-Company titles

these titles use characters outside their own universe and / or merge universes

Bat-Thing (Amalgam)
Batman / Captain America (Marvel)
Batman / Danger Girl (Wildstorm)
Batman / Daredevil (Marvel)
Batman / Deathblow (Wildstorm)
Batman / Grendel (Comico)
Batman / Grendel (Dark Horse)
Batman / Judge Dredd: Die Laughing (2000AD)
Batman / Judge Dredd: Judgment on Gotham (2000AD)
Batman / Judge Dredd: The Ultimate Riddle (2000AD)
Batman / Judge Dredd: Vendetta in Gotham (2000AD)
Batman / Predator (Dark Horse)
Batman / Predator II (Dark Horse)
Batman / Predator III (Dark Horse)
Batman / Punisher (Marvel)
Batman / Spawn (Image)
Batman / Spider-man (Marvel)
Batman / Spirit (DC)
Bruce Wayne: Agent of SHIELD (Amalgam)
Catwoman / Vampirella (Harris Comics)
Dark Claw Adventures (Amalgam)
Darkness / Batman (Top Cow)
Ghost / Batgirl: The Resurrection Engine (Dark Horse)
Green Lantern / Silver Surfer (Marvel)
JLA / Avengers (Marvel)
JLA / Cyborforce (Top Cow)
Legends of the Dark Claw (Amalgam)
Planetary / Batman: Night on Earth (Wildstorm)
Punisher / Batman (Marvel)
Spawn / Batman (Image)
Spider-man / Batman (Marvel)
Spyboy / Young Justice (Dark Horse)
Superman / Madman: Hullabaloo (Dark Horse)
The New Teen Titans / The Uncanny X-Men (Marvel)