Hi,
Unity (Indie and Pro) can speak now. Sorry, only for Windows standalone 
Need a Voice Recognition solution? Try this
[EDIT 05/01/18 NEW VERSION HERE…]( Text to Speech [Dll] for Windows Desktop. page-4#post-3340957)
Your are free to include this DLL in any app or project you want.
You are free to modify and change anything you want. Yes, even the copyright and my name. 
The “VoiceSpeaker.CS” file
// Voice Speaker (c) ZJP
//
// Windows 32B >> Copy 'Voice_speaker.dll' in windows\system32 folder
// Windows 64B >> Copy 'Voice_speaker.dll' in windows\SysWOW64 folder
// Remember to release "Voice_speaker.dll" with your final project. It will be placed in the same folder as the EXE
//
// Voice Speaker (c) ZJP //
using UnityEngine;
using System;
using System.Collections;
using System.Runtime.InteropServices;
public class VoiceSpeaker : MonoBehaviour
{
[DllImport ("Voice_speaker.dll", EntryPoint="VoiceAvailable")] private static extern int VoiceAvailable();
[DllImport ("Voice_speaker.dll", EntryPoint="InitVoice")] private static extern void InitVoice();
[DllImport ("Voice_speaker.dll", EntryPoint="WaitUntilDone")] private static extern int WaitUntilDone(int millisec);
[DllImport ("Voice_speaker.dll", EntryPoint="FreeVoice")] private static extern void FreeVoice();
[DllImport ("Voice_speaker.dll", EntryPoint="GetVoiceCount")] private static extern int GetVoiceCount();
// Unity V4.x.x
[DllImport ("Voice_speaker.dll", EntryPoint="GetVoiceName")] private static extern IntPtr GetVoiceName(int index);
// other Unity version
// [DllImport ("Voice_speaker.dll", EntryPoint="GetVoiceName")] private static extern string GetVoiceName(int index);
[DllImport ("Voice_speaker.dll", EntryPoint="SetVoice")] private static extern void SetVoice(int index);
[DllImport ("Voice_speaker.dll", EntryPoint="Say")] private static extern void Say(string ttospeak);
[DllImport ("Voice_speaker.dll", EntryPoint="SayAndWait")] private static extern void SayAndWait(string ttospeak);
[DllImport ("Voice_speaker.dll", EntryPoint="SpeakToFile")] private static extern int SpeakToFile(string filename, string ttospeak);
[DllImport ("Voice_speaker.dll", EntryPoint="GetVoiceState")] private static extern int GetVoiceState();
[DllImport ("Voice_speaker.dll", EntryPoint="GetVoiceVolume")] private static extern int GetVoiceVolume();
[DllImport ("Voice_speaker.dll", EntryPoint="SetVoiceVolume")] private static extern void SetVoiceVolume(int volume);
[DllImport ("Voice_speaker.dll", EntryPoint="GetVoiceRate")] private static extern int GetVoiceRate();
[DllImport ("Voice_speaker.dll", EntryPoint="SetVoiceRate")] private static extern void SetVoiceRate(int rate);
[DllImport ("Voice_speaker.dll", EntryPoint="PauseVoice")] private static extern void PauseVoice();
[DllImport ("Voice_speaker.dll", EntryPoint="ResumeVoice")] private static extern void ResumeVoice();
public int voice_nb = 0;
void Start ()
{
if( VoiceAvailable()>0 )
{
InitVoice(); // init the engine
if (voice_nb > GetVoiceCount()) voice_nb = 0;
if (voice_nb < 0) voice_nb = 0;
// Unity V4.x.x *******************************************
IntPtr pStr = GetVoiceName(voice_nb);
string str = Marshal.PtrToStringAnsi(pStr);
Debug.Log ("Voice name : "+str); // Voice Name
// Unity V4.x.x *******************************************
//Debug.Log ("Voice name : "+GetVoiceName(voice_nb)); // Voice Name other Unity version
Debug.Log ("Number of voice : "+GetVoiceCount()); // Number of voice
SetVoice(voice_nb); // 0 to voiceCount - 1
Debug.Log ("Voice Rate : "+GetVoiceRate());
SetVoiceRate(2);
//Debug.Log ("Voice name : "+GetVoiceName(voice_nb));
Say("All system nominal. Engine, online, weapons, online.. We are ready. 9.,.8.,.7.,.6.,.5.,.4.,.3.,.2.,.1.,.0.,. Go,.Take off");
// Say("Tout les systèmes sont opérationnels. Moteurs, en ligne. Armement, en ligne. Nous sommes prêt. 9.,.8.,.7.,.6.,.5.,.4.,.3.,.2.,.1.,.0.,. .Décollage" );
}
Application.Quit();
}
void OnDisable()
{
if( VoiceAvailable()>0 )
{
FreeVoice();
}
}
}
Have fun,
JP
Edit :
Do not forget : executing Windows\sysWOW64\speech\SpeechUX_SAPI.cpl_ brings up a Window that displays all of the 32 bit Voices and the current single 64 bit Voice “Anna”.
RealSpeak Solo de Nuance (Scansoft). Free Voice
(French - Virgine) http://www.mta.alainlapierre.com/res/RSSolo4FrenchVirginie.zip
(German) - Steffi) http://www.mta.alainlapierre.com/res/RSSolo4GermanSteffi.zip
(Italia) - Silvia) http://www.mta.alainlapierre.com/res/RSSolo4ItalianSilvia.zip
(Spanish) - Isabel) http://www.mta.alainlapierre.com/res/RSSolo4SpanishIsabel.zip
(English) - Emily) http://www.mta.alainlapierre.com/res/RSSolo4UKEnglishEmily.zip
(Us - Jennifer ) http://udm4.com/Windows/RealSpeak_Solo_Direc-391899
EDIT 12-18-15.
NEW VERSION (WITH SOURCES) HERE…
357731–12430–$voice_speaker_879.zip (204 KB)
