Cortana Microsofts answer to Google Now and Siri has leaked, the guys and gals at Android Police have got hold of the APK and you can download it now at their website.
Cortana provides most of the functionality that Windows Mobile features and even has graceful integration with the Android OS.
Microsoft are on a bit of a roll of late and their efforts to bring their software and services across to other systems is welcome, Cortana feels great to use.