Voice Principles - Guiding principles for voice design, all in one place
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
Actions on Google - The open platform for Google Assistant
Amazon Blueprints - Create your own Alexa Skill in minutes