Alexa Skill Kit - Effortless Alexa Skill development with AWS Lambda
SmallDevTools - Handy developer tools with a delightful interface
BotTalk - Create Alexa skills and Google Assistant actions with Markup
whatdevsneed - This is whatdevsneed.
OK Google - Explore over 150 Google Now voice commands in one place
Google Open Source - All of Googles open source projects under a single umbrella