Pieces already comes with 300 ready-to-use animations grouped into three sets, IN (with fade-in effect), OUT (with fade-out effect) and MID (without fading effect). Check it out.
You can use Pieces without writing code. It's integrated within Wordpress Visual Editor (TinyMCE).
Pieces allows you to animate any image in your site (not only those inside posts or pages). It already comes with a settings page where you can set different animations to any image, using jquery selectors.
Take a look at this video and discover how simple is to use Pieces. You can use it without writing code!