I highly recommend overtone as well. Very cool project!

As far as I can tell it is open source.

Can't seem to install the plugin - chrome is blocking the installation and I can't find it in the chrome extension store...

Good stuff! Started playing with it and I love the interface. Can't wait to see what kind of studies will emerge thanks to this tool.

Good work! Love the color scheme.

Thanks! I've made some hacks to the original molokai (like the background on the numbers).

Cool! Thanks for sharing.