Very simple to use, yet powerful, specially to prototype highly interactive applications.
Great product all around. Shows many signs of having been designed by people who do prototyping themselves.
Current version 6 could be faster and with more search tools (i.e. to find a page to link)
Very easy to use. Can add specs and generate a MSWord documenting the specs.
The GUI Mockup design tool for Windows, Web and Mobile Applications
The best gui Mockup product for Desktop, Web and Mobile Applications
Easy to learn and to use. Very powerful for online prototyping. Solid reusable components and styling. great support and lively community. Possibility for annotations. Weak points - not optimized for printed specification, very slow in collaboration mode
This product is the best - comparing with many others (online and offline). After months of evaluation we choose and buy WireframeSketcher for our team (10 developers).
Web-based, fast, intuitive and fully interactive.
Been using it for some time now and it's much better than Axure and Balsamiq