WireframeSketcher

WireframeSketcher is a software tool that helps quickly create wireframes, mockups and prototypes for desktop, web and mobile applications. It comes both as a plug-in...

Commercial Mac OS X Windows Linux Eclipse

Mockup Builder

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...

Freemium Web

Flairbuilder

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

Commercial Mac OS X Windows Linux

ProtoShare

ProtoShare is a web-based, collaborative wireframing and prototyping tool. It hosts a WYSIWYG drag-and-drop interface, as well as advanced components users can...

Commercial Web

ForeUI

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...

Commercial Mac OS X Windows Linux

Iplotz

Wireframe your Ideas iPlotz allows you to rapidly create clickable, navigable mockups and wireframes for prototyping websites and software applications. Create a...

Freemium Web

quickMockup

Online tool for creating mockups in the browser. Use your browser’s save function to save the file (just html for view only, complete save for an editable version) or...

Free Open Source Mac OS X Windows Linux Web Self-Hosted

MockupScreens

Create five screens in ten minutes without any programming knowledge or prior training! MockupScreens, a rapid screen prototyping tool for technical and non-technical...

Commercial Windows

Prototype Composer

Serena Prototype Composer - the best agile application prototyping tool is now free! View the demo, take the product tour, or download it free today.

Freemium Windows

Napkee

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

Free Open Source Mac OS X Windows Linux

PowerMockup

PowerMockup is a PowerPoint add-in for sketching screens of web and desktop applications. The interface elements make it a breeze to prototype and evaluate different...

Commercial Windows Microsoft Office Powerpoint

UX-App

Mock with real html components, prototype with draggable puzzle pieces & share in any browser. Collaborate through threaded comments per component + full group chat.

Freemium Mac OS X Windows Linux Web

Composite

Automatically connects to your Photoshop document and converts your mockups into interactive prototypes using layer comps to organize your documents into screens....

Commercial

Moqhub

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...

Freemium Web

Quant-UX

Quant-UX is an integrated Prototyping and Analytics software. It allows you to design, test and analyze interaction prototypes.

Freemium Mac OS X Windows Linux

MockupCreator

MockupCreator is a tool to create mockups, prototypes and wireframes. MockupCreator will help you to accelerate your products development and improve the quality of...

Commercial Windows

Tiggr

Tiggr is an application for creating user interface prototypes collaboratively online.

Free Web

Keynotopia

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

Commercial Web