PAPERPROTO is a Rapid prototyping tool that makes user testing more realistic and organized. We all start with scribbles in a notebook, but this is the next step in a design flow. This tool enables you to iterate quickly and get useful user feedback.
The download consists of a 3D printed phone (iOS and Android models) and a designed fitted paper. After user testing take the findings and turn those findings into a functional document.
We have used this tool many times at Team One and in other projects such as Girls who Code. Team One hosted a UX hackathon event for them. We made a special Girls who Code edition for all the attendees to take with them and continue their user testing.