Node-RED Alexa Home Skill Bridge
This node and service allows you to create your own "devices" to work with the Amazon Echo's Home Skill system, giving you voice control over basically anything you can interface with Node-RED. There is support for not only things like Belkin WeMo and Philps Hue, but also a whole range of homebrew devices. You can also use Alexa to kick off seqences of events not just discrete on/off type actions Amazon Echoで「○○をつけて」と言って家電を操作する
PCで使う例
入門記事
Alexaスマートホームスキル『Node-RED』を使ってみた