Here’s a great Tumblr that has an amazing archive of original animation drawings, models and many more.
It’s an interesting webpage to go through when you have the time just to look at the sort of artwork that went into animation before the final presentation of it all completed.
There are some amazing pieces of art also that truly inspire you to create some amazing and truly powerful characters that contrast against the surroundings. With rich designs and a great understanding of movement, the characters are designed to live and breathe and come to life on-screen as well as simply looking pretty on a page.
More recently it also has this great look into Pixar’s up and coming film Brave which has some astounding art for the film, as expected. From original concept art to some of the models created of the characters and storyboards. Here’s one of the videos on the site,