The links bellow are works in progress. They are still in draft form.
These links are widgets that have errors - they are great for testing your testing tools or testing your debugging skills.
Samples are often taken from other sources and errors are inserted.
Original pages include: http://test.cita.illinois.edu/aria/index.php and http://www.oaa-accessibility.org/examples/
Patterns taken from http://www.w3.org/TR/wai-aria-practices
For the official requirements for roles for WAI-ARIA (see http://www.w3.org/TR/2011/CR-wai-aria-20110118/roles) for authors, see roles requirements.