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