Jovo - 🗣 Build cross-platform apps for Alexa and Google Home
Astra by Cesbo - Talk to Alexa anywhere, from your iPhone
Alexa Skill Kit - Effortless Alexa Skill development with AWS Lambda
Reverb - Use Alexa on your Mac, iPhone and Android
Voiceflow - Build voice apps in your browser without coding
Amazon Blueprints - Create your own Alexa Skill in minutes