Developer website: Touch-voice.com
Developer website: www.tobii.com
Cost: Free for the lite version, $99.99 for the non-lite version
Developer website: www. verballyapp.com
Cost: Free. There is an upgraded version for $99.99 that I have not tried. According to the developer, the upgrade allows one to save phrases and conversation history, has an email connect option and the choice of voices----male, female or child.