A feature I think is missing from the flowable-task app is the ability to save a form without submitting it. Some forms can take a while for an end user to fill in completely and it would be good for users to be able to save their progress. As it is today an accidental reload of the browser will lose all changes.
It appears in the Flowable source code that an implementation has been started at some point but not completed. I have completed this implementation and would like to contribute it back to Flowable.
Is this a feature you would be interested in? If so I will need to clean it up and add a few tests first then I can create a pull request.