Here is a list:
Girl Genius (There is a thread.)
Rex Mundi (Image)
The Adventures of Luther Arkwright (Dark Horse reprint)
The Heart of the Empire (Dark Horse)
Chassis (Image and now Hurricane, though don't hold your breath)
Moorcock's Mulitverse (Vertigo)
Sebastian O (Vertigo)
Steampunk (Cliffhanger)
Authority (DC/Wildstorm)
Planetary (The Sliding Albion story arc) [DC/Wildstorm]
Monarchy (DC/Wildstorm)
Tom Strong (ABComics)
Top 10 (ABComics)
V for Vendetta (DC)
The Crosstime Caper (story arc in Excalibre Vol. 1) [Marvel]
Tangents (DC reimagined)
Baker Street
The Boston Bombers
Excalibre (Vol. 2) [Marvel]
The Age of Apocalypse (X-Men) [Marvel]
Anything dealing with the man called Kang the Conqueror, The Scarlet Centurion, Immortalis, or Rama-Tut (Marvel Comics)