Alexa Skill Kit - Effortless Alexa Skill development with AWS Lambda
Alexa Skill Builder by Chatamo - Build your own Alexa skills for free (no code required)!
BotTalk - Create Alexa skills and Google Assistant actions with Markup
SSML Editor - Making voice apps sound more human
Unified Remote - Unified Remote is a software app available for iPhone, Android, and Windows Phone mobile operating systems. It's designed to turn your smartphone into a universal remote. Read more about Unified Remote.
Voice Principles - Guiding principles for voice design, all in one place