VoiceAttack - VoiceAttack will take commands that you speak into your microphone
ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.
VoiceMacro - Control applications or games by voice commands and/or by the press of a keyboard, mouse button or...
Mycroft.AI - Mycroft is the world’s first open source assistant.
VoiceBot - Take command of your games with your voice using VoiceBot!
Google Assistant - Get things done with Google Assistant