I'm surprised nobody has mentioned Node-RED yet: http://nodered.org/ http://nodered.org/ Node.js-based with a Pipes-like visual wiring interface. It's quite po

I'm surprised nobody has mentioned Node-RED yet: http://nodered.org/ http://nodered.org/ Node.js-based with a Pipes-like visual wiring interface. It's quite popular with the Raspberry Pi and Arduino crowd. Lot's of input and output plugins, and you can drop into Node scripting when necessary. I quite like it.