Apps with 'Prototyping' feature

Figma is a vector graphics editor and prototyping tool which is primarily web-based, with additional offline features enabled by desktop applications for macOS and Windows.

Penpot is the first Open Source design and prototyping platform meant for cross-domain teams. Non dependent on operating systems, Penpot is web based and works with open web standards (SVG). For all and empowered by the community.

Pencil is a standalone app that lets you create diagrams or UI mockups. It doesn't have collaboration/multi-user features.

Lucidchart is a visual workspace that combines diagramming, collaboration, and data visualization to accelerate understanding and drive innovation. With this intuitive, cloud-based solution, everyone can work visually and collaborate in real time.

Lunacy is a native Windows app that opens, edits, and stores .sketch files. In short, it’s long-awaited Sketch for Windows. It solves the big pain of design teams working on different operating systems and improves the process of transition from design to development.

Scalable, secure, cross-device and enterprise-ready team collaboration tool for distributed teams.

Responsive web design tool, CMS and hosting platform.

Adobe XD (Experience Design) is a vector-based tool developed and published by Adobe Inc for designing and prototyping user experience for web and mobile apps.

to design circuits, as well as so called "layouts", be it PCB or stripboard or breadboard...

Balsamiq Wireframes is a rapid low-fidelity UI wireframing tool that reproduces the experience of sketching on a notepad or whiteboard, but using a computer.

We believe the screen is the most important place in the world. That’s why we are dedicated to helping you deliver the best possible digital product experience, with our platform and best practices from your peers.

Create websites quickly and customize them with ease. Based on Bootstrap, HTML5 and SASS, Pingendo lets you create and manage webpages from prototyping to deploy.

Framer combines the power of code with the ease of visual editing. Prototype beautiful microinteractions or realistic apps. It’s time to design with development in mind.

Axure RP is the leading tool for rapidly creating wireframes, prototypes and specifications for applications and web sites.

Moqups is an all-in-one online design platform that's smart, simple and fast. Go from diagrams to wireframes and prototypes without switching apps or updating across platforms.