So you think reversing and getting source code of an APK is a big deal. Then give a try to Xenotix APK Decompiler.

APK Decompiler is an Open Source Android Application Package (APK) decompiler powered by dex2jar and JAD written in Python.

Minimum Requirements
OS: Windows
JDK 1.6
Wx Python

Download
https://github.com/ajinabraham/Xenotix-APK-Decompiler/