Freeplane - Freeplane is a powerful and free software for building mind maps.
Mobbin - Latest mobile design patterns & elements library
vym - VYM (View Your Mind) is a tool to generate and manipulate maps which show your thoughts.
pttrns - iPhone and iPad user interface patterns
Pencil Project - Single-user mockup / wireframing / diagramming tool
UX Archive Animated - iOS apps animated user flows