Suggest an alternative to

CircularProgressButton

Implementation of Colin Garvin's [submit button concept](http://dribbble.com/shots/1426764-Submit-Button)

Why do you think that https://github.com/jashkenas/docco is a good alternative to CircularProgressButton

A URL to the alternative repo (e.g. GitHub, GitLab)

Here you can share your experience with the project you are suggesting or its comparison with CircularProgressButton. Optional.

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