I'd like to add text to speech on the iOS, but noticed that NSSpeechSynthesizer seems to be missing from Cocoa-Touch.
Are there any third party, commercial or FOSS, libraries that you would recommend? Will Apple reject an app that contains a third party library?
I've heard that OpenEars is good, but I don't really know too much about it. As for Apple accepting an app with third-party libraries, it all depends on whether or not the third-party library uses private frameworks or not. I'm sure that information is available on the OpenEars website.