Gliffy
Gliffy is a powerful HTML5 online diagram maker. Create a flow chart, network diagram, UML diagram, organizational chart or wireframe with ease.
19 Alternatives To Gliffy
Balsamiq
Balsamiq. Rapid, effective and fun wireframing software.
Cacoo
A cloud-based diagram maker for companies, teams, and you.
Creately
Share. Reuse. Innovate.
Dia
Dia is a GTK+ based diagram creation program for GNU/Linux, MacOS X, Unix, and Windows, and is released under the GPL license.
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
HotGloo
Wireframing and prototyping with webbased HotGloo. Create interactive, responsive wireframes for web and mobile. Includes 15-day free trial!
Invision
Prototyping and collaboration for design teams
LucidChart
LucidChart is the missing link in online productivity suites. LucidChart allows users to create, collaborate on, and publish attractive flowcharts and other diagrams from a web browser.
MockFlow
MockFlow is an online wireframe tool for software and websites
Moqups
The most stunning HTML5 app for creating resolution-independent SVG mockups, wireframes & interactive prototypes for your next project
NinjaMock
NinjaMock is the faster, better and funnier way of making mockups
Pidoco
Pidoco is a powerful web-based prototyping software for rapidly creating clickable wireframes and interactive UX prototypes for web and mobile applications.
PlantUML
PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.
SmartDraw
Instead of starting with a blank screen, SmartDraw gives you the exact template you need.
UXpin
Design is really about solving problems. UXPin is the UX Design Platform that gets that right.
Visio
Simplify and communicate complex information using data-linked diagrams.
mockingbird
Mockingbird helps you you create and share clickable wireframes. Use it to make mockups of your website or application in minutes.
yEd Graph Editor
yEd is a free desktop application to quickly create, import, edit, and automatically arrange diagrams. It runs on Windows, Mac OS X, and Unix/Linux.