Briefs!

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. Teams can come up with a design and iterate over it in real-time in the course of a meeting.

Webflow automatically generates beautiful code for your website for you as you design. You don't have to write code yourself or hire a developer to do it for you. Webflow generates valid markup and stylesheets, so you can trust that the generated code is clean. Webflow automatically adds code to render consistently across different browsers.

Axure RP is the leading tool for rapidly creating wireframes, prototypes and specifications for applications and web sites.

Macaw provides the same flexibility as your favorite image editor but also writes semantic HTML and remarkably succinct CSS. It's time to expect more from a web design tool.

Fluid UI is the fastest mobile app prototyping tool available. Design and test your low and high fidelity app mockups on a mobile device with ease. Simple and UX oriented, this UI tool helps unlock creativity and will save your team time and money while gathering app requirements.

ANTETYPE is a brand new, ground-breaking design application that supports user interface designers at every step of their work. Design beautiful interfaces, invent new widgets, style them and put it all together in an interactive prototype!

An intuitive cloud-based tool that speeds up web development process.Design, Develop, Publish or Download your websites right from your browser.

Automatically connects to your Photoshop document and converts your mockups into interactive prototypes using layer comps to organize your documents into screens. Transition between them by defining hotspots in the layer name you want to be tappable.

SwordSoft Layout is an desktop application that makes it very easy for you to create, preview, and manage mockups of your website, mobile application or desktop application. With so many UI elements to choose from, you can design anything. Some key features include: clean and clear interface, unlimited page size

Prototype cheaply and quickly for iPad, iPhone, Android, Windows Phone 7, Facebook and web using Apple Keynote, Microsoft PowerPoint or OpenOffice Impress.

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.