Proto.io
Bring your idea to life in no time. The prototyping solution for all your needs. For UX designers, entrepreneurs, product managers, marketers, and anyone with a great idea. Start building your first prototype in no time. Proto.io's intuitive, drag & drop interface gives you all the building blocks that you need to get started! No skills required. Take advantage of the various user interface libraries, full of UI components that not only look like but also mimic the behavior of their original native counterparts. A huge variety of ready-made and fully-customizable Templates for Web and Mobile, with all the popular blocks and elements that you commonly need. No need to search for assets to complement your prototypes. Proto.io comes complete with a wide selection of both Static and Animated Icons, Stock Images, and even Sound Effects.
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Lunacy
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.
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Slickplan
Slickplan helps teams & agencies bring order to complex website projects—from first ideas to production-ready deliverables. Instead of juggling docs, spreadsheets and disconnected tools, it provides one workspace to structure site architecture, map user flows, plan content and review designs collaboratively. This integrated approach means faster launches, fewer revisions, smoother handoffs to developers and stronger collaboration from planning to production. Teams can visualize navigation with interactive sitemaps, generate or refine structures using the AI sitemap assistant and connect UX diagrams to real visitor behavior. Structured content blocks, inline comments and SEO fields keep writing CMS-ready, while Figma integration simplifies design reviews and approvals. With exportable XML, Word or PDF files, version tracking and permissions control, Slickplan keeps every project clear, secure and on schedule—transforming web planning chaos into clarity.
Plan websites faster, together
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UXPin
Speed up your product development process with revolutionary Merge technology. From UI designers to UI developers – create consistent interfaces using the same building blocks. Build prototypes that feel like the end product. Get creative with our design tool or start with hundreds of built-in UI elements. Integrate with Storybook , Git repo, or NPM package and use code components straight from your design system, app or website. Design with the exact same UI code components that devs build the product with. No coding skills required – just drag and drop the elements. Design inclusive products in line with WCAG standards. Test your prototypes with built-in features like Contrast Checker and Color Blindness Simulator. With States, Variables, Conditional Interactions and Auto Layout, your prototypes will perfectly mimic the end product experience, during usability testing.
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