eSpeak
eSpeak is a commandline based audio synthesis programme.
It came standard with Ubuntu (8.04) and works perfectly on this amd64 bit computer.
This simple line of text does several lovely little bits of magic: espeak -vnl -f voicetest.txt -w TEST.wav
-vnl: choose the Dutch voice (more languages here: http://espeak.sourceforge.net/languages.html )
-f: choose a textfile as sourcematerial to read from.
-w: save this text in this soundfile.
Done!