Bites are cute ready-to-use popups with really clean html/css-code and free xd-sources. Choose any popup you like, set up the appearance trigger, animation speed and type, popup position and fade color in the css file. Then put popup code into your page and connectcss.
Hue Sentiment is an easy to use Philips Hue light app which translates text into a mood. Simply type how you're feeling and notice the lights change based on your mood.