Most battleships from the Gundam anime series have rotating sections to produce artificial gravity, but for the most part they are completely internal, so they don't have any visible rotation from the outside. The only ones that do have external rotating sections are the Argama and Jupitris from Zeta Gundam, the latter being big enough to be called a mobile space colony.
Edit: Wow, I can't believe I never thought about this until now, but ships with rotating sections (particularly large ones) are a seriously bad idea, especially for combat. Because of angular momentum and rotational inertia, simply having a rotating section will make it much harder to turn a ship for the same reason a spinning bicycle wheel wants to stay upright. A ship with a rotating section might take twice as much energy to turn as the same ship with the section fixed in place. That, and large external rotating sections are pretty vulnerable targets in space battles. This is a pretty big disadvantage to suck up in exchange for a luxury like gravity.