Later a tool called Procyon replaced many of the aforementioned tools.
P.S. Not including links for any of those tools as apart from being obviously outdated, Many of those tools started flagging for malware in later days; Perhaps they're just false positive considering their feature set but I don't want to risk it.
Java Decompilation:
Method 1: Dare + JD Decompiler +Cavaj (or) DJ Decompiler
Method 2: dex2jar + JD Decompiler + Cavaj (or) DJ Decompiler
Method 3 : AndroChef Java Decompiler
Accessing Apk Resource Files:
Apk Tool.
Selecting Decompilation of System Files:
Smali, Backsmali
Later a tool called Procyon replaced many of the aforementioned tools.
P.S. Not including links for any of those tools as apart from being obviously outdated, Many of those tools started flagging for malware in later days; Perhaps they're just false positive considering their feature set but I don't want to risk it.