Mobbin - Latest mobile design patterns & elements library
VisualSitemaps - Autogenerate visual sitemaps in seconds.
pttrns - iPhone and iPad user interface patterns
Codrops Blueprints - Free website concepts ready to implement or modify
Page Flows - User flow design inspiration for mobile & desktop
Octopus.do - Build your website structure in real-time and rapidly share it to collaborate with your team or clients. Start prototyping websites or apps instantly.