If you like this sort of thing, and are on a Mac, you have Quartz Composer available, which I find fun to play with and which is actually pretty powerful.

http://en.wikipedia.org/wiki/Quartz_Composer

Among other things, you can make your own screensaver, and have access to various inputs and outputs such as the built in camera, mic, URL's, etc.

I've been using this QC toolkit for UI prototyping: http://facebook.github.io/origami/ . Works pretty well.

Why isn't the first thing I see on the Animatron website an animation made in their own app? http://animatron.com/

Webflow did this with yesterday's post: http://interactions.webflow.com/

it's coming in new website.

the video on the front page made in animatron http://www.animatron.com/project/6487dd52e5835971c6bec25d

and there are others of course http://www.animatron.com/explore#staff-picks

Funny that there is a link in that post back to an original earlier post on Hacker News: https://news.ycombinator.com/item?id=7360296

Interesting the team used GWT. I would like to see a post about how they found it, and if they would choose it again for a new project.

I would use GWT for any big webapp. tooling is way better for java than for js. having the same model on server and on a client is a huge plus as well.

Loved the article. I was happy to see something materialize out of GWT too!