Use Johnny-Five inside of a chrome application
This open source app allows you to program and run a Johnny-Five powered robot.
Simply plug in an Arduino or Arduino-compatible device that has been loaded with the StandardFirmata sketch into a serial port. Select the serial port, and run your script.
You may also use this app to load StanardFirmata onto an Arduino Uno or compatible board.
You have the full Johnny-Five API to use as well as a few other helpful libraries included.
These Chromebots / Browserbots can even run offline!