Briefs

Briefs is the essential app design tool built for a professional design workflow.

20 Alternatives To Briefs

Antetype

Antetype - Layout aware User Interface Design - responsive and future proof.

AppCooker

Design, mockup and prototype mobile applications with AppCooker. Discover the most powerful mockup engine ever created on the iPad. AppCooker and AppTaster deliver the full scope of the prototyping tools.
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AppTaster

Share mockups and wireframes with clients on their iPhone or iPad.
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BluePrint UI design

Blueprint is an UI design application for iPad and iPhone
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Composite

Composite is a brand new way of creating interactive prototypes. It automatically connects to your Photoshop® document and converts your mockups into interactive prototypes in seconds. No need to export images or maintain tons of hotspots.

Fluid UI

Fluid UI helps you prototype Android, iPhone, iPad or Windows 8 mobile apps with our custom libraries, or upload your own images for pixel perfect mobile

Fuse

Fuse is a UX tool suite for mobile app designers and developers.

Invision

Prototyping and collaboration for design teams

Ionic Creator V2

Build better mobile apps, faster

MockFlow WireframePro

Super-easy wireframing

Moqups

The most stunning HTML5 app for creating resolution-independent SVG mockups, wireframes & interactive prototypes for your next project
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POP (Prototyping on Paper)

POP helps you make interactive prototype with ease. If you can draw, you can design apps.

Pencil

Pencil is an animation/drawing software for Mac OS X, Windows, and Linux.
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Pencil2D

Pencil2D is an opensource animation/drawing software for Mac OS X, Windows, and Linux, based on old…

ProtoShare

ProtoShare is a web-based, collaborative wireframing and prototyping tool.
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ProtoTouch

Create, Preview, Share and Install in any iPhone iPod iPad or web browser your mobile prototypes…
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Prototypr

Prototypr helps you build prototypes rapidly and easily.

Typostrap

Typostrap is a prototyping tool for web and apps.

Wired Designer

Simple but functional mockup designer based on Rough.js.
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Zeplin

Collaboration app for UI designers & frontend developers