You are the content you publish.
Sign up with Facebook
Sign up with Twitter
I don't have a Facebook or a Twitter account
Start a free trial of Scoop.it Professional
Online frame by frame tool.
Must create an account to save
Let’s you pause item into multiple frames (to make animation easier to watch)
Has onion-skinning so you can see previous frames - best one around
Has range of pen tools and styles
Very straightforward to use