Fluid UI
Fluid UI is a prototyping platform that enables designers, developers, and product teams to create interactive wireframes and mockups for web and mobile applications. It features a drag-and-drop editor with pre-built UI kits for iOS, Material Design, and wireframing. The tool supports real-time collaboration, interactive linking, and testing on mobile devices via dedicated player apps. It offers both browser-based access and a desktop client for cross-platform design workflows.
Checked on Oct 19, 2026.
Alternative resources
Visily
AI-powered UI design and wireframing software built for non-designers to quickly create mockups, prototypes, and layouts.
Checklist Design
A comprehensive collection of UX, UI, and web design checklists, best practices, and component guidelines for designers.
Excalidraw
Virtual whiteboard tool that lets you sketch hand-drawn style diagrams stored locally in the browser.