Fluid UI is a browser-based wireframing and prototyping tool developed by Fluid Software and used to design mobile touch interfaces.
License: Freemium
Fluid UI is a comprehensive design tool specializing in UI/UX design, offering advanced features like prototyping and user testing, making it suitable for professional designers. In contrast, Diagramo is a simpler tool focused on basic diagramming, making it ideal for quick sketches and light projects.