You can set a message on a dot matrix display by Alexa!
Alexa controlled timers at a glimpse. A really fancy egg-timer with added temperature control.
An IoT Thing using the Amazon cloud that monitors and reports observed radio frequency spectral power and can be remotely controlled.
This skill uses email command to control LEDs from a skill anywhere in the world and visualize the game.
A box full of startup ideas, a new procedurally generated idea is displayed every time it is opened.