Best Prototyping Software in the USA

Lunacy is a vector graphic software for UI/UX and web design. It's faster than Figma, smarter than Sketch! Key features: * FREE for personal and commercial use * Runs on Windows, macOS, and Linux * WORKS ONLINE AND OFFLINE You can work both with cloud and local documents. It's up to you to choose. You can switch between the cloud and local modes whenever you want. * REAL-TIME COLLABORATION between users on different platforms * BUILT-IN GRAPHICS (Icons, Photos, Illustrations) and AI-POWERED TOOLS (Background remover, Image upscaler, Avatar & Text generators) * FULL SUPPORT of .SKETCH DOCUMENTS: Open, Edit, Save. * LOW SYSTEM REQUIREMENTS and MINIMUM LEARNING CURVE *NO BOUNDS Thanks to the native support for the Sketch format, you can use Lunacy with all major hand-off and version control tools like Avocode, Zeplin, Abstract, Simpli, etc. If it is necessary, you can easily import .sketch files to Figma or XD.

Penpot is the free open-source design tool that allows true collaboration between designers and developers. Hand-off drama disappears, thanks to features like CSS Grid, Flex Layout and the Code Inspect tab. Designers can create stunning designs, interactive prototypes, design systems at scale, while developers enjoy ready-to-use code and make their workflow easy and fast.

Design, prototype and collaborate to bring your ideas to life. Transform the way you create Salesforce prototypes down to the smallest detail. Customize layouts for both Salesforce desktop and mobile interface. Get a preview of your prototypes, test and validate everything. Set the resizing rules to easily scale things up and down for different screen resolutions and adapt them for desktop and mobile. Layouts will resize with their text and elements inside to fit a wide array of modern devices. Easily modify a component's UI for different screen sizes by creating custom classes. Wouldn’t it be great if you could import existing objects, fields and layouts from your Salesforce into Avonni? That's easy with just a few clicks. No need to recreate everything from scratch. Use 400+ pre-built templates specifically tailored for Salesforce Lightning. Charts, related lists, modal boxes, cards, just to name a few. Quickly customize them with our easy-to-use drag and drop tool.

Storyboard is an embedded GUI development framework that accelerates the design and delivery of modern UX for tomorrow’s IoT and wearable devices. With its Rapid Design Import and Iteration Technology, embedded developers around the world are able to create products that offer unmatched GUI experiences (graphics, voice, and audio), uniquely optimized for all operating systems and platforms, including resource-constrained MCU and MPU platforms. Storyboard aligns embedded developers with the iterative change processes of designers — using popular tools like Sketch and Photoshop — helping manufacturers achieve high-quality UX without sacrificing performance or development time. With only a few mouse clicks, developers use Storyboard to visualize changed assets and rapidly assess, accept, or reject elements in a timesaving manner. This accelerated workflow allows teams to refine their products at any stage in their development cycle.