[Need help] Suggestions for good TTS software

My friends,

I need your suggestions for good and free/opensource text to speech software.

Help me with your experience and ideas. thank you!

Hi,

Festvox/Festival TTS - implements all important algorithms for speech processing
OpenMary - a TTS system in Java.
HMM-based speech synthesis system (HTS) - a frontier system for HMM-based speech synthesis