The Responsive Designer
Mobile Emulators and Simulators - The ultimate guide to mobile developers | Breaking the Mobile Web
Links to all the available mobile emulators!
Creating Single Element iPhone using CSS3 | CSSDeck
On the amazing use of box-shadow
Transiting from native iOs apps to webapps: 5 top design patterns
8 Popular online apps to test the mobile version of your site
35 Inspiring Mac Related Websites
ProtoFluid - HTML5 and CSS3 Web App Prototyping
Test your @media queries and web app on various screen sizes
Safari Reference Library
The Safari Reference Library provides detailed information for web developers on iPhone, iPod touch, Mac, and PC. These resources include guides and articles, API reference documents, sample code, release notes, and technical notes. Use these resources to learn about Safari's developer tools, visual effects, HTML and CSS support, JavaScript and DOM support, and other features and technologies. The library is organized by Topics and Resource Types
10 tips for designing mobile websites | These Days Labs
Webkit CSS Properties
Safari for Desktop and iPhone properties listed in a table. A must have.
jQTouch
AjQuery plugin for mobile web development on the iPhone, iPod Touch, and other forward-thinking devices.