Input-x-webkit-speech is a project mainly written in JAVASCRIPT and PYTHON, it's free.
Demo App for <input x-webkit-speech>
This is a demo app for <input x-webkit-speech> found in Chrome 8+
JS is Compiled using Google Closure Library / Compiler, Backend written on App Engine
closurebuilder.py --root=~/closure/lib/
--root=js/
--namespace="thurloat.voiceChat"
--output_mode=compiled
--compiler_jar=~/closure/compiler.jar
--compiler_flags="--compilation_level=ADVANCED_OPTIMIZATIONS" > output.js