VoiceMacro - Control applications or games by voice commands and/or by the press of a keyboard, mouse button or...
VoiceAttack - VoiceAttack will take commands that you speak into your microphone
Rhasspy - Rhasspy transforms voice commands into JSON events that can trigger actions in home automation software.
VoiceBot - Take command of your games with your voice using VoiceBot!
SpeechTurtle - SpeechTurtle is a voice recognition tool that has a simplified c# scripting interface.
Simon Speech Recognition - Simon is an open source speech recognition program that can replace your mouse and keyboard.