This desktop tools enhancement is new in the Developer 2/07 release.
Orca is a free, open-source, flexible, and extensible screen reader that provides access to the graphical desktop. Access is through user-customizable combinations of speech, braille, or magnification.
Orca works with applications and toolkits that support the Assistive Technology Service Provider Interface (AT-SPI), which is the primary assistive technology infrastructure for Solaris and Linux operating systems. Applications and toolkits that support the AT-SPI include the GNOME GTK+ toolkit, the Java platform's Swing toolkit, OpenOffice, and Mozilla.