Voice is your Text-to-Speech application for Mac OS X. It offers various unique features. Ideally for learning at school, eLearning platforms, audio books, video tutorials, anonymous talking and so on. 97 free system voices. Features: 79 professional natural voices / Save as AIFF audio file / Calculate total cost / Adjust cost per word / Count number of words / Plays selected text / Plays from the current cursor position / Calculates durration (play time) automatically
You just need Mac OS X. Maybe it works also on PowerPC, it is an universal application.