Download Android 5.0 Key Lime Pie

Android Key Lime Pie has popped up running on both the Nexus 4 and Nexus 7

Android Key Lime Pie - dubbed Android 5.0 - has appeared running on the Google Nexus 7 and Google Nexus 4.
The leaks were discovered by CNET in the Chromium bug tracker, which is an open-source browser project that also tests how devices access the internet.
Both the Nexus 4 and Nexus 7 were listed as running the KRS36B build of Android.
Android 4.3 has just been rolled out to both devices, with build numbers JSS15J and JWR66V respectively (with the J standing for Jelly Bean), so this new version, starting with a 'K' for Key Lime Pie certainly would suggest the next version of Android is now being tested in the wild.
Android Key Lime Pie hasn't officially been announced yet. In fact, many were expecting it to be released at Google I/O back in May.
Very few details are known about the next build of Android, but it's thought the update will be a much bigger overhaul of the system in comparison to Android 4.3, which focussed more on the back-end of the platform.
It's thought Android Key Lime Pie will launch later this year, possibly October or November, alongside the next Google phone – the Nexus 5