Balsamiq Wireframes is a rapid low-fidelity UI wireframing tool that reproduces the experience of sketching on a notepad or whiteboard, but using a computer.

Wireframes are FAST: you will generate more ideas, so you can throw out the bad ones and discover the best solutions.

Power of Balsamiq:

• UI Components & Icons. Hundreds of built-in and community-generated UI controls and icons.
• Drag & Drop Simplicity. Assemble elements with the confidence of knowing they can be implemented.
• Export to PNG or PDF. Share or present wireframes on the web, via images, or via interactive PDFs.
• Optimized for Speed. Wireframe at the speed of thought with Quick Add and many keyboard shortcuts.
• Re-usable Symbols. Create templates, masters, and re-usable and customizable component libraries.
• Interactive Prototypes. Linking lets you generate simple prototypes for demos or usability testing.