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 versatile tool that excels in prototyping and collaboration, making it suitable for complex design projects, especially for mobile applications. In contrast, Balsamiq Mockups focuses on quick wireframing and ideation, offering a simpler, more user-friendly interface ideal for non-designers and low-fidelity sketches.