Adobe XD is a commercial vector user experience design tool for designing web apps and mobile apps

Balsamiq Mockups is a rapid wireframing tool that helps you Work Faster & Smarter.

Diagramo is an online flowchart software. It's FREE and Open Source ( GPL ) It's pure HTML5 Share and collaborate.

Figma is a collaborative interface design tool.

Gliffy is software for diagramming via a HTML5 cloud-based app. It is used to create UML diagrams, floor plans, Venn diagrams, flowcharts and various other ki…

Lucidchart is a web-based application to draw diagrams.

Axure RP is a wireframing, rapid prototyping, documentation and specification software tool aimed at web and desktop applications.

Creately is a collaborative diagramming and design software used by teams around the world to communicate more effectively.

Edraw Max is comprehensive mind mapping and planning tool network diagrams, floor plans, workflow diagrams, business charts, and engineering diagrams.

Fluid UI is a browser-based wireframing and prototyping tool developed by Fluid Software and used to design mobile touch interfaces.

InVision is a prototyping, collaboration & workflow platform.

MockFlow is a collection of wireframe tools, prototyping tools, UI mockups, UX suite.