I wanted the title to be as broad as possible. This may be a thread where everything related to speech synthesizers and TTS, from questions and problems to suggestions and available/newly-released voices/engines, is posted. So I have two questions:
1. I already have eSpeak-NG and RHVoice on my iPhone but can anyone list all the available third-party TTS engines? New ones may be added to this list as they're released. And does anyone know whether DecTalk will be ported to iOS?
2. Would it not be great to have an option to download third-party TTS engines from within VoiceOver settings, just like we can go to App Store to download fonts? Well, just letting me quickly go the app store and having me look for fonts or TTS engines myself doesn't actually help much, so users should only see fonts if they choose to download fonts from the App Store, or TTS engines if they choose to download TTS engines/voices.