IFTTT

IFTTT is a free web service that allows the user to create conditional statements known as applets. You can connect Facebook, Instagram, Skype, Reddit, YouTube, Google, your smart home, and much more. Turning on specific applets helps connect many applications for better connectivity. Each applet does something different.

Here are just a few:

You can also create your own applets.

You can create an IFTTT account on https://ifttt.com/ or you can sign up with Google or Facebook.