All the clean cover art I could find. If you have more, please contribute! For regular covers, see the Cover Gallery. For pencils and inks (non colored) of covers, see Cover Roughs.
Batgirl
Batgirl (third series)
Batman Family
Bruce Wayne: The Road Home
Gotham Underground
Red Robin
Robin
Supergirl (fifth series
Teen Titans (third series)
War Drums and War Games
The Web
Young Justice