Tessel 2

Tessel is programmed in JavaScript, and comes with Wifi built in. Tessel runs JavaScript and supports NPM (the Node package manager) that's HTTP, Twitter, web server, color, and async right out of the box. New features on Tessel 2 include extremely reliable WiFi, an ethernet jack, two USB ports, and a system that runs real Node.js/io.js.

Capabilities such as sensing, and actuation can be added to Tessel with plug-and-play modules, or you can do your own wiring through the GPIO bank.

More information is available on the websites of Sparkfun and Tessel.