Atlasgeo: Germany: Animated GIF image.
Flags of the World: East Germany: National, subnational, military, and political flags.
Flags of the World: Germany: National, subnational, historical, and political flags.
German Flag History: Offers an overview on the German national and state flags, with images and history.
Theodora.com: Flag of Berlin: Images in several sizes.
Theodora.com: Flag of Germany: Images in several sizes.
Theodora.com: Schleswig-Holstein Flag: Images in several sizes.
World Flag Database: Germany: National and state flags, ensigns, and country facts.