Axure RP is a wireframing, rapid prototyping, documentation and specification software tool aimed at web and desktop applications. Developed by Axure Software Solutions, Inc
License: Commercial
Axure RP is a powerful tool ideal for complex prototypes with detailed interactivity and user testing features, making it suitable for larger projects. In contrast, Fluid UI offers a more user-friendly interface and is better for quick, collaborative prototyping, but lacks some of the advanced features found in Axure.