Alva
  |Delphi (4nn)@
Android
  |text to speech engine@
BrailleLite
  |@
CombiBraille
  |@
eSpeak
  |text to speech engine@
eSpeak-NG
  |text to speech engine@
ExternalSpeech
  |runs /usr/local/bin/externalspeech@
Festival
  |text to speech engine@
FestivalLite
  |text to speech engine@
GenericSay
  |pipes to /usr/local/bin/say@
Mikropuhe
  |text to speech engine@
Swift
  |text to speech engine@
Theta
  |text to speech engine@
ViaVoice
  |text to speech engine@
