Fluid UI is a browser-based wireframing and prototyping tool developed by Fluid Software and used to design mobile touch interfaces.
License: Freemium
Apache OpenOffice Draw. Makes drawing business processes and diagrams a snap! Draw - from a quick sketch to a complex plan, Draw gives you the tools to communicate with graphics and diagrams. With a maximum page size of 300cm by 300cm, Draw is powerful tool for technical or general posters, etc. Developed by Apache Software Foundation
License: Open Source
Fluid UI is tailored for rapid prototyping and collaborative design, making it ideal for UI/UX projects. In contrast, Apache OpenOffice Draw is a versatile drawing tool suited for technical and detailed illustrations.