Lexi - Speak to Alexa through your iPhone
Jovo - 🗣 Build cross-platform apps for Alexa and Google Home
Voice Principles - Guiding principles for voice design, all in one place
API to bot - Convert your API to Alexa skill or Google Home app in 5 mins
Actions on Google - The open platform for Google Assistant
Alexa for Business - Using Amazon Alexa’s voice enabled devices for workplaces