There is a new version of DJ-ImageSlider - free slideshow Joomla extension available.
It supports the WCAG and section 508, so now the users can easily navigate through slides and pause them using keyboard keys.
DJ-ImageSlider is an another extension from collection that was updated with WCAG and Section 508 standard.
Read more about the image slideshow update. You can find there also links to other extensions updated with support WCAG and Section508.