Checklist Design - The best UI and UX practices for production ready design.
UserInterface.io - Weekly UI/UX tips in your inbox for free
UXsniff - Track user behavior on your website and improve conversions with UXsniff: the user experience watchdog that looks out for you.
pttrns - iPhone and iPad user interface patterns
Uxcel - The easiest way to learn UX/UI design
UX Recipe for iOS - Design checklist & estimation tool for your next UX project