FlairBuilder is a user interface prototyping tool for easy authoring of interactive website wireframes, mockups and GUI prototypes.

Frame0 is described as 'Sketch your app ideas without stress Make hand-drawn style wireframes quickly and easily' and is a Wireframing tool in the photos & graphics category. There are more than 50 alternatives to Frame0 for a variety of platforms, including Mac, Web-based, Windows, Linux and iPhone apps. The best Frame0 alternative is Penpot, which is both free and Open Source. Other great apps like Frame0 are Figma, Pencil Project, Napkins.dev and Whimsical.
FlairBuilder is a user interface prototyping tool for easy authoring of interactive website wireframes, mockups and GUI prototypes.

HotGloo is a UX, wireframe and prototyping tool designed to build wireframes for web, mobile and wearables. Create and share fully interactive prototypes with your team and clients and gather feedback on the process.



Design your software or website mockups within minutes. Mockup Builder is a new look to solve old problem with prototyping and sharing sketches with customers. This startup was built to solve developer’s needs in product that can help to make it better communication tool between...











Napkee makes your Balsamiq Mockups come alive. Import a BMML and export to web or flex code in a few clicks.

Specfox is the first tool to address the tedious process of writing website specifications, which is often frustrating and time-consuming. You shouldn't be spending hours trying to explain developers design features and creating ugly descriptions in software which was not...




MockupTiger is a web based application that helps you to build fluid wireframes, mockups or prototypes for your next web application or desktop software.

Serena Prototype Composer - the best agile application prototyping tool is now free! View the demo, take the product tour, or download it free today.
SureFeedback, previously ProjectHubble, is a platform for creating effective web content. It includes features like an AI assistant, document editor, command library, and more. It improves client communication by efficiently collecting and managing live feedback.



EaSynth ForeUI is an easy-to-use UI prototyping tool. You can use ForeUI to create skinnable prototype of software or website, and run the interactive simulation in your web browser. You can switch the UI theme of the prototype, thus the fidelity will be changed as well.


