Mycroft.AI - Mycroft is the world’s first open source assistant.
Rhasspy - Rhasspy transforms voice commands into JSON events that can trigger actions in home automation software.
SEPIA Framework - SEPIA is a server-based, extendable, personal, intelligent assistant.
Google Assistant - Get things done with Google Assistant
Amazon Alexa - Virtual assistant developed by Amazon
Almond - Connect with top dietitians via personal video consultation