The modern Java bytecode editor

A lightweight and fast AOP framework for Android App and SDK developers

A fast, incremental, concurrent framework to develop compile plugin for android project to manipulate bytecode

inspectIT is the leading Open Source APM (Application Performance Management) tool for analyzing your Java (EE) applications.

Multifunctional java deobfuscation tool suite

The open-source Java obfuscation tool working with Ant and Gradle by yWorks - the diagramming experts

Easy-to-use java bytecode editor - successor of JByteMod!

All-in-one Java reverse engineering tool

A practical tool for bytecode manipulation and creating Managed Code Rootkits (MCRs) in the Java Runtime Environment

Companion library to SpongePowered Mixin with many custom injectors for a more expressive experience.

Maven plugin that will apply Javassist bytecode transformations during build time.

An extensible java agent framework that instruments (modifies the bytecode at class loading time) programs running on the JVM, with the purpose of capturing method invocation events (start, finish, errors ...) and notifying custom listeners.

Standalone program and library which can downgrade Java classes/programs down to Java 8

常见框架开发技术的demo汇总，包括java字节码编程（java agent, instrument, byte buddy）, java动态代理，自定义classloader，java spi, zero copy, netty, spring aop/condition，spring boot starter, 数据库连接池等。

An all-purpose mixins framework for Java bytecode manipulation at runtime, targeted at those with minimal understanding of the bytecode structure.

A low code API gateway | FaaS framework based on script engine. The implemented function is to execute a script for each HTTP request received. Used for protocol conversion, reverse proxy, service orchestration, BFF, etc. 基于脚本引擎的低代码 API 网关 ｜FaaS 框架，用于 FaaS BFF，服务编排等。

A smart, fast alternative to Java's reflection API.

JDBL automatically removes unnecessary bytecode from Java applications through dynamic analysis https://dl.acm.org/doi/abs/10.1145/3546948

A small and fast library for manipulating Java bytecode.

Minecraft Server (Bukkit, Spigot, Paper) backdoor, using ow2 asm