Run scripts on your RPi/Linux device when voice commands are issued to Alexa. An AWS account is needed but the free tier is used (no cost).
An easy-to-build humidifier with RGB backlight that can be controlled by Amazon Alexa.
A nightlight lantern powered by Alexa Home Skill.
This control board integrates with Arduino to allow users to control all aspects of a smart home through a website or Alexa voice commands.
Build a smart lamp that can be controlled by flipping a switch and Alexa, for only $35.
Let the sun turn your Hue lights on automatically.