UserInterface.io - Weekly UI/UX tips in your inbox for free
Checklist Design - The best UI and UX practices for production ready design.
pttrns - iPhone and iPad user interface patterns
UXsniff - Track user behavior on your website and improve conversions with UXsniff: the user experience watchdog that looks out for you.
Uxcel - The easiest way to learn UX/UI design
UI Playbook - The documented collection of UI components