Bytecode Viewer v2.9.11 released: Java 8 Jar & Android APK Reverse Engineering Suite (Decompiler, Editor, Debugger & More)

From prodefence.com

Bytecode Viewer is an Advanced Lightweight Java Bytecode Viewer, GUI Java Decompiler, GUI Bytecode Editor, GUI Smali, GUI Baksmali, GUI APK Editor, GUI Dex Editor, GUI APK Decompiler, GUI DEX Decompiler, GUI Procyon Java Decompiler, GUI Krakatau, GUI CFR Java Decompiler, GUI FernFlower Java Decompiler, GUI DEX2Jar, GUI Jar2DEX, GUI Jar-Jar, Hex Viewer, Code Searcher, Debugger and more.
It’s written completely in Java, and it’s open source. It’s currently being maintained and developed by Konloch.