Apktool
APK Editor Studio
JADX
APK Studio
Xposed Framework
ShowJava
APKInspector
TTDeDroid
Java Decompiler
Decompiler.com
CFR
Bytecode Viewer
Java Class File Editor
Cavaj Java Decompiler
ShenmeApp Java Decompiler
.NET Reflector
ApktoolAPK Editor Studio - APK Editor Studio is an open-source Android application editor that allows you to edit APKs with the help of reverse engineering.
Decompiler.com - Online Java and Android decompiler. Just drag and drop .JAR or .APK file and browse decompiled content online.
JADX - JADX is a decompilation tool that can produce Java Source code from Dex and Apk files, being capable of providing human-readable java classes, it reverses AndroidManifest.
CFR - CFR is a JVM bytecode decompiler - it will decompile modern Java features - up to and including much of Java 9, but is written entirely in Java 6, so will work anywhere! - It'll even make a decent go of turning class files from other JVM languages (โฆ
APK Studio - APK Studio is an open-source Integrated Development Environment that allows you to recompile and decompile Android applications with its unified interface.
Bytecode Viewer - A Java 8 Jar & Android APK Reverse Engineering Suite (Decompiler, Editor, Debugger & More)