For those who are using Android Smartphones, Speaktoit Assistant is not something new. It is a Siri-like app with an avatar. Now, it is available on Windows Phone 8 and Windows 8.
I have downloaded the app. So far so good. The layout is clean and nice. However, since it is new, I have yet to explore everything. Here is some skills that Speaktoit Assistant has (for Windows Phone 8).
Here is how you can get it.
Click Here to Download Speaktoit Assistant for Windows 8