Orca Gnome - Accessibility

Orca screen reader is a programmable free and open source. It uses speech capabilities, braille, and magnification. Orca helps provide access to applications and toolkits that support AT-SPI (eg, the Gnome desktop). The development of the Orca has been led by the Accessibility Program Office of Sun Microsystems, Inc.tendo contributions of several members of the community.

Orca More information can be found on the links below:
Gnome Orca