Wireframe, a skeletal outline of the components of a certain website, is a great way to ensure clarity and consistency during website development as you can better see the relationships between the elements. Creating a website wireframe lets you speak out your ideas before you start building the website which will let you discover any potential problems or logical inconsistencies before transforming the design into code.

A wireframe is a great way to clarify the vision of an entire web development team. Web developers and designers use basic boxes and lines to define the spaces on the page, to clarify branding and navigation, and to indicate where text will reside — before the actual images and content have been created. After wireframing, the team will proceed to the design stage whereas they will establish the brand of the website.

When creating a website, there are some website builders, HTML5 and CSS3 tools and cloud applications that will aid the web designers and developers. Before you put your interest into that, however, you may want to take a look first at some UI wireframe tools. So, here’s a collection of powerful desktop and online UI wireframe tools that will help you create website outline before you proceed detailing the specifics.

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iPhone Mockup

With this online wireframe tool, you can easily create an iPhone mockup using the drag-and-drop feature and choose between “illustration” and “pencil”.
iPhone Mockup
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MockFlow – Online Wireframe Tool

Design, collaborate user interface concepts for your software and websites. MockFlow Design Cloud provides design tools and collaboration services for designers. Its flagship software – “MockFlow Wireframe” is used by thousands of customers worldwide.
MockFlow - Online Wireframe Tool
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Creately: Online Wireframe and UI Mockup Tool

Quickly design website wire-frames and mock-ups using web based easy to use mock-up tool. In addition to the templates, users have access to a large set of wire-frame and UI mockup objects in many libraries.
Creately: Online Wireframe and UI Mockup Tool
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SimpleDiagrams: Create Simple Diagrams in a Snap

SimpleDiagrams is a small desktop application that keeps the visual expression of ideas clear through the simple design of library items and backgrounds. Because the last thing you want to do is overload your audience with over-cooked visuals.
SimpleDiagrams: Create Simple Diagrams in a Snap
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iPlotz: Wireframing, Mockups and Prototyping

iPlotz allows you to rapidly create clickable, navigable mockups and wireframes for prototyping websites and software applications. Create a project, add wireframe pages with design components and discuss your creations with others.
iPlotz: Wireframing, Mockups and Prototyping
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UI Wireframe Tools: JustProto

JustProto was built from the ground up by developers for wireframing collaboratively, so it gives you and your clients a quick and easy way to experience your prototype and avoid tomorrow’s problems today.
UI Wireframe Tools: JustProto
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Cacoo – Create Diagrams Online

Cacoo is a user friendly online drawing tool that allows you to create a variety of diagrams such as site maps, wire frames, UML and network charts. Cacoo can be used free of charge.
Cacoo - Create Diagrams Online
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UI Wireframe Tools: Lumzy

From creating a prototype, to sending it to clients, everything is seamless. In fact, Lumzy doesn’t have a file extension, so your client need not bother downloading a player to open any prototype files. A link is all they need.
UI Wireframe Tools: Lumzy
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Pencil Project

Pencil is built for the purpose of providing a free and open-source GUI prototyping tool that people can easily install and use to create mockups in popular desktop platforms.
Pencil Project
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Gliffy Venn Diagram

Creating a website wireframe is easy with Gliffy’s free wireframe tool. Just drag and drop boxes, buttons, and lines from the web wireframe tool shape library anywhere onto the page. Then add text to your website wireframe to create a clear web site mockup.
Gliffy Venn Diagram
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Microsoft PowerPoint Presentation Templates