Looking to jump into voice development? Here are quick links to the major developer kits for voice:
Tagline: Get things done with your content and services using just their voice with SiriKit
Tagline: Create a Cortana skill, reach millions of users in a natural and helpful way and create intelligent, personalized experiences for users
Tagline: Bring voice control, to your devices by embedding the Google Assistant
Add voice to your big idea and reach more customers
Tagline: Mycroft is an open source voice assistant that can be extended and expanded to the limits of your imagination
Tagline: A new way to interact with your phone – assisting in completing tasks, telling you what you’re looking at, learning your routine and remembering what you need to do.