I've been using "No Flash!" for over a year now. Not a single flash animation on any web page. It causes me a little problem here and there, when some web page uses flash for a menu... but in general I've been much happier. No flash ads and no moving animations.
Although some times I wonder if I'm missing something I'd be interested in. But I doubt it. You can find it here:
(I use version 1.5.3, and they are up to 2.1. I don't know the difference.) I think it works by changing registry entries. I don't actually have to have the program running to work, and this is the only thing that makes sense. This might not be true in the latest version, though.