JsSpeechRecognizer is a javascript based speech recognizer. It allows you to train words or phrases to be recognized, and then record new audio to match to these words or phrases.
Artyom.js is a voice recognition javascript library. You can make awesome stuff with Google Chrome speech synthesis and speech recognition. You can build your own Siri, Google Now or Cortana within your web application.
JuliusJS is a speech recognition library for the web.It actively listens to the user to transcribe what they are saying through a callback.
annyang is a javascript library for adding voice commands to your site, using speech recognition. It supports multiple languages, has no dependencies and is free to use.