Amazon Polly - Named for a parrot, Amazon Polly is a text-to-speech (TTS) software that makes your text come to life in a natural, authentic way. The software has many lifelike voices, both male and female, and in a variety of languages.
BeneTalk - Speech coach for people who stutter by people who stutter
Api.ai - Api.
Duolingo - Duolingo is a free language learning app for iOS, Windows and Android devices. The app makes learning a new language fun by breaking learning into small lessons where you can earn points and move up through the levels. Read more about Duolingo.
Edwin - Language app that combines AI & professional English tutors.
Askeygeek AI Text To Speech - A free text to speech app based on Amazon Polly