Usability

Introduction to Apple Human Interface Guidelines. Human Interface Design Principles

KDE Standards. User interface guidelines

Usability Toolkit. Evaluation and usability testing

The GNOME Usability Project. usability article, guideline , usability testing

UPA. Usability Professionals' Association

STC Usability SIG Web Site. Usability links of usability special interest group

Berbee: Application Management, Hosting, Security, eBusiness, Networking, Servers, Storage, Internet. Download services about usability.

HCI Bibliography : Human-Computer Interaction / User Interface Usability. Guidelines for designing user interface software.

Trace Research and Development Center. Trace center of University of Wisconsin-Madison / Usable product design center, good resources