What is the easiest and fastest way/language/tool I can use to build high quality animated web content and web apps.?

By easiest, I also meant one that requires the shortest learning curve possible.

NOTE1: Excluding Flash, Photoshop and any other Adobe products. (Why? Well, because (a) I use Linux and (b) I can’t afford their disgustingly expensive prices, (c) I’m not welling to use Windows for it and (d) Because I hate Adobe altogether.

Plus, I really need something I can embed with my Python/Django or Plone project.