Adb logcat with logcat options(via WiFi or usb cable)
Four versions of apktool(1.4.3, 1.5.3, 2.3.2, latest development)-if error occurs while decompiling program will try to use alternative version and will compile your apk with version that was used for decompilation
Four languages at the moment(Russian, English, Dutch, Deutch) - if you want to translate program into other language just let me know