Default A collection of UI guidelines

One of the primary resources for experts conducting Usability Evaluation or Design Reviews is intimate knowledge and familiarity with industry standard User Interface Design Guidelines.

General User Interface Design Style Guides

Open Source Usability Guidelines

Corporate User Interface Standards and Guidelines (samples)

Government funded Usability Guidelines (American)

Gaming Devices (J2ME games)

Wireless and Mobile Usability Guidelines

Web style guides

Other Platforms

Accessibility Guidelines