Lucidchart
Online diagram and flowchart software that supports Microsoft Visio import and can work on any operating system.
Upload your designs,mockups or wireframes by file or by URL snapshot, organize them and connect them to web prototypes. Share them with friends, colleagues and clients...
Upload your designs,mockups or wireframes by file or by URL snapshot, organize them and connect them to web prototypes. Share them with friends, colleagues and clients to get point specific Feedback. Giving Design Feedback is also possible without any registration.
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Online diagram and flowchart software that supports Microsoft Visio import and can work on any operating system.
Freemium
Using Balsamiq Mockups feels like you are drawing, but its digital, so you can tweak and rearrange controls easily, and the end result is much cleaner.
Commercial Mac OS X Windows Web
Free web and mobile mockup tool. Transform your design and mockups into clickable interactive applications. Perfect way to validate ideas faster with lean startup thinking. Best tool for quick prototyping.
Freemium Web
Enterprise Architect is a collaborative modeling, design and management platform based on UML and related standards.
Commercial Windows
mockingbird is an online tool that makes it easy for you to create, link together, preview, and share mockups of your website or application. It is not Flash based.
Commercial Web
Simple vector graphics editor for creating flowcharts, UML class diagrams, illustrations and slide shows.
Free Windows
Use your existing WordPress site to get feedback on your design projects. Upload your design images, wireframes, mockups, logo sketches, photography and more. Gather comments directly on top of your designs.
Commercial Self-Hosted Wordpress