Are you planning to open source or make a product? We're working with headless content solutions, and despite our best efforts to digitise everything - people on the floor still need physical copies of things.
Hooking up a good PDF editor for output is hard, but this is a nice solution.
No plans to open source at the moment, but I might consider it. I just added a Subscribe button to support further development of the software and get access to premium features.
Which features (if any) that if added would you be willing to pay for?