Justinmind Prototyping tool is an authoring tool for web and mobile app prototypes and high-fidelity website wireframes. It offers capabilities typically found in diagramming tools like drag and drop placement, re-sizing, formatting and export/import of widgets. In addition, it has features for annotating widgets and defining interactions such as linking, animations, conditional linking, calculations, simulating tab controls, show/hide elements and database simulation with real data. There is support for high-fidelity simulation of Rich Internet Applications, and app prototypes can be simulated on the actual devices too, thanks to Justinmind app. Justinmind can generate HTML prototypes that can be displayed in any browser, and Microsoft Word specification documents.