The first version of AccessODF helps authors evaluate and repair accessibility issues in Writer documents. Accessibility evaluation of presentations (in Impress) is not yet available.
Warning: If you get an error dialog with the words com.sun.star.registry.CannotRegisterImplementationException in it when installing the extension on Ubuntu, open a command line and enter the command sudo apt-get install openoffice.org-java-common. This solution may also work for other Linux distributions.