Considering that Microsoft paid $8.5 billion to acquire Skype back in 2011, the company should—at the very least—have expected a decent mobile app out of the deal. And the good news is: They got just that! While other major tech brands have had issues making the jump into the WP ecosystem, the Skype app works as well as in any other environment.
You probably already know what Skype is and what it can do for you. If you are one of the unacquainted few, just know that Skype is arguably still the best cross-platform video chat tool. Download that sucka.