Subtly - Learn English with smart subtitles on movies and TV shows
Voiceflow - Build voice apps in your browser without coding
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.
Jovo - 🗣 Build cross-platform apps for Alexa and Google Home
BoldVoice - Accent coaching app for non-native English speakers
Alexa Skill Kit - Effortless Alexa Skill development with AWS Lambda