We’ve been seeing leaked versions of Microsoft’s digital assistant popping up on Android forums, but Cortana for Android is now available as a public BETA for everyone, no special login or credentials required.
One of the more popular features found on Windows Phones, Cortana can replace Google Now as the search and assistant on Android devices. Known for having more personality, she often does a better job of responding to casually delivered commands. We showcased some of her capabilities here in this older review of Windows Phone.
You can grab the BETA for yourself by going to this preview page, and happily you wont need to sign up for any Google Plus community or developer access. Enjoy!