Wireframing and designing site structure
- 40 helpful resources on user interface design patterns
Via Smashing Magazine
Home of Balsamiq Mockups, a Rapid Wireframing Tool
HotGloo is a rich internet application designed to build functional online wireframes for a website or web projects.
Quick online vectorial mockups tool
Enables you to run online card sorts with minimal fuss
Gets answers to questions about which labels work best, whether a structure is too deep and where to put certain types of content
A free card sorting application for Mac OS X aimed at user experience professionals and social scientists.