Diigo meets most of the WCAG 2.0 Standards.<br /> <strong>Perceivable</strong>: Hints within field labels; All content are text content etc.<br /> <strong>Operable</strong>: No repeatedly flashing images; Easy to navigate and find content; Form fields are in a logical tab order; Most important actions can be performed through keyboard etc.<br /> <strong>Understandable</strong>: Text are Readable and understandable; All delete actions need users to confirm etc.<br /> <strong>Robust</strong>: Compatibility with most mainstream browser versions for Chrome, Firefox, IE and Safari.