You can find them in the Modding Academy forum. I found the .NET reflector, used for changing or adding script in the apks. Then there's the Easy APK tool, for decompiling apks. I used the Notepad ++ for editing script too e.g .smali, .xml. Anyways the only thing I can do as of now was creating toast messages, dialogues and splash screen maybe. Well нажмите здесь. если вы хотите узнать больше.