Here are a few steampunk animated films I enjoy. I have been an animator for over ten years so naturally I have a soft spot.
First up, The Invention of Love, amazing visual style, steampunk silhouette animation.
Next, an ad for Terry Gilliam's, 1884's Yesterday's Future.
And finally, the first reminded me of Michel Ocelot, an amazing French animator. This is one of his first works, which just happens to have a steampunk vibe.