Cortana is Windows Phone's answer to Siri and Google Now: A voice-activated artificially intelligent personal assistant with an only slightly off-putting robot voice. Technically, she's still in beta on Windows 8.1, but PhoneBuff is here to show us 50 things Cortana can already do.

Looks like Cortana's got some seriously handy capabilities—and a pretty cheeky sense of humor (love that little "Bill Gates is my daddy" wink). For comparison, PhoneBuff also shows us what Siri can do:

...and what Google Now is capable of:

Of course, the most hilarious (if least helpful) way to use Cortana, Google Now, and Siri is to pit them all against each other in an insane robot shouting match. The future is awesome. [PhoneBuff]