1337 Pwn, spelled with the numbers one three three seven, is an xbox live app for Android phones that gives players the ability to check on the status of their Xbox Live friends and do much more. Although it is not sanctioned by Microsoft, the app actually has plenty of useful features that really help this app earn its place on the Android platform.
The app doesn't give users the option to sign into their account but instead, let's them access all public information about any user they add into the app. Adding a new Xbox Live user will show the gamer's status and achievements along with the avatar they have selected. The app is free in the market and has been available for a very long time. It has been receiving constant updates by it's creator which improve the speed of the app but there are still options that I would love to see added like a refresh button or the ability to send messages within the app. This technically can't be added though because of Microsoft's restrictions. But overall it is definitely a useful app. Check it out.