Nodeblu is a free Chrome extension designed for experimenting with the Octoblu and Meshblu Internet of Things platforms. This tool allows users to easily create and manage IoT applications by dragging, dropping, and wiring various nodes. It serves as a fork of the popular NodeRED application and enhances its functionality with additional features tailored for local use.

The extension includes capabilities such as speech recognition, text-to-speech, and HTML5 notifications. Users can also leverage a WebRTC webcam, access ChromeDB, and utilize a gamepad controller. Furthermore, Nodeblu enables connectivity to local and remote Arduino and Spark devices through its Microblu OS, making it a versatile option for IoT enthusiasts.