bytecode-viewer - A Java 8 Jar & Android APK Reverse Engineering Suite (Decompiler, Editor, Debugger & More)

•    Java

A Java 8 Jar & Android APK Reverse Engineering Suite (Decompiler, Editor, Debugger & More)

robovm - Ahead of time compiler for JVM bytecode targetting iOS, Mac OSX and Linux

•    Java

The RoboVM compiler translates Java bytecode into native ARM or x86 code. Apps run directly on the CPU. No interpreter or virtual machine involved.

Kamon - Tool for monitoring applications running on the JVM

•    Scala

Kamon is a reactive-friendly toolkit for monitoring applications that run on top of the JVM. It provides API to manually create metric recording instruments for any application running on the JVM. It provides bytecode instrumentation modules for Scala, Akka, Spray and Play. It supports several reporting backends like StatsD, Datadog and New Relic. It also allows to create custom reports.

Metascala - A JVM written in Scala

•    Scala

Metascala is a tiny metacircular Java Virtual Machine (JVM) written in the Scala programming language. Metascala is barely 3000 lines of Scala, and is complete enough that it is able to interpret itself metacircularly. Being written in Scala and compiled to Java bytecode, the Metascala JVM requires a host JVM in order to run. Although it is far from a complete implementation, Metascala already provides the ability to run untrusted bytecode securely (albeit slowly), since every operation which could potentially cause harm (including memory allocations and CPU usage) is virtualized and can be controlled. Ongoing work includes tightening of the security guarantees, improving compatibility and increasing performance.

IKVM.NET - Java for Mono and .NET Framework

•    Java

IKVM.NET is an implementation of Java for Mono and the Microsoft .NET Framework. It has JVM implemented in .NET. A .NET implementation of Java class libraries. It is interoperable between Java and .NET.

jclasslib - jclasslib bytecode viewer is a tool that visualizes all aspects of compiled Java class files and the contained bytecode

•    Kotlin

jclasslib bytecode viewer is a tool that visualizes all aspects of compiled Java class files and the contained bytecode. In addition, it contains a library that enables developers to read and write Java class files and bytecode. There is a plugin for IntelliJ IDEA that can be installed via the plugin manager. The action in the "View menu" can be invoked when a Java, Groovy or Kotlin file is open in the editor.

JavaGuard

•    Java

JavaGuard is a general purpose bytecode obfuscator, designed to fit effortlessly into your regular build and testing process, providing peace of mind that your valuable Java code is more secure against decompilation and other forms of reverse engineering

JPHP - An alternative to Zend PHP, like JRuby and Jython only for PHP

•    Java

JPHP is a new implementation for PHP which uses the Java VM. It supports many features of the PHP language (7.0+).How does it work? JPHP is a compiler like javac, it compiles php sources to JVM bytecode and then can execute the result on the Java VM. JPHP is not a replacement for the Zend PHP engine or Facebook HHVM.

jphp - An alternative to Zend PHP, like JRuby and Jython only for PHP

•    Java

JPHP is a new implementation for PHP which uses the Java VM. It supports many features of the PHP language (7.1+). How does it work? JPHP is a compiler like javac, it compiles php sources to JVM bytecode and then can execute the result on the Java VM.

ASM - Java bytecode manipulation and analysis framework

•    Java

ASM is an all purpose Java bytecode manipulation and analysis framework. It can be used to modify existing classes or dynamically generate classes, directly in binary form. Provided common transformations and analysis algorithms allow to easily assemble custom complex transformations and code analysis tools.

Apache Commons BCEL - Bytecode Engineering Library

•    Java

The Byte Code Engineering Library is intended to give users a convenient possibility to analyze, create, and manipulate (binary) Java class files (those ending with .class). Classes are represented by objects which contain all the symbolic information of the given class: methods, fields and byte code instructions, in particular.

Bytecode Translator: A translator from .NET bytecode to Boogie

Bytecode Translator is a translator from .NET bytecode to Boogie.

python-uncompyle6 - A Python cross-version decompiler

•    Python

A native Python cross-version decompiler and fragment decompiler. The successor to decompyle, uncompyle, and uncompyle2. uncompyle6 translates Python bytecode back into equivalent Python source code. It accepts bytecodes from Python version 1.5, and 2.1 to 3.7 or so, including PyPy bytecode and Dropbox's Python 2.5 bytecode.

jclasslib bytecode viewer

•    Java

jclasslib bytecode viewer is a tool that visualizes all aspects of compiled Java class files and the contained bytecode. In addition, it contains a library that enables developers to read, modify and write Java class files and bytecode.

Flasm - a Flash bytecode assembler

•    C

Flasm is an assembler/disassembler for Flash actionscript bytecode. Using flasm, script authors may learn how actionscript compiler and Flash Player virtual machine work, and tweak the compiled bytecode in SWF files for performance.

Visual Examinator

•    Java

Bytecode Examinator - This is a gui application that aids students learning of Java bytecode and Java class file construction. It provides visual insight to assembly and disassembly of Java bytecode.

undx

•    Java

Undx is a bytecode translator, it converts the bytecode for the dalvik vm (a virtual machine for android applications) to standard java bytecode.

redex - A bytecode optimizer for Android apps

•    C++

ReDex is an Android bytecode (dex) optimizer originally developed at Facebook. It provides a framework for reading, writing, and analyzing .dex files, and a set of optimization passes that use this framework to improve the bytecode. An APK optimized by ReDex should be smaller and faster than its source.Getting these dependences is easiest using a package manager.

GCJ

•    C

GCJ is a portable, optimizing, ahead-of-time compiler for the Java Programming Language. It can compile Java source code to Java bytecode (class files) or directly to native machine code, and Java bytecode to native machine code.

TechTrader Bytecode Toolkit

•    Java

The TechTrader Bytecode Toolkit is a high-level set of APIs for manipulating java bytecode. It is primarily targeted at making runtime and/or compile-time enhancements to existing java classes, or creating new java classes on the fly.