Websites to create prototypes

Moqups is a versatile web-based design and collaboration tool for creating wireframes, mockups, diagrams, and prototypes, streamlining the design process from concept to handoff. ...more

Balsamiq Mockups is a low-fidelity wireframing tool designed for rapid prototyping and brainstorming. It allows users to quickly create mockups of user interfaces and collaborate on design ideas with a focus on functionality rather than detailed visual design. ...more

yEd Graph Editor is a versatile and free desktop application for creating high-quality diagrams of various types, including flowcharts, UML diagrams, BPMN diagrams, and more. It offers powerful automatic layout algorithms and a wide range of formatting options, making it suitable for both simple and complex visualizations. ...more