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The modern Java bytecode editor

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

Risor is a fast, embeddable scripting language for Go applications. Add dynamic expressions, filters, and user-defined logic to your Go programs without embedding a heavy runtime like V8 or Python. Expressions compile to bytecode and run on a lightweight VM. Pure Go, minimal dependencies.

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

Java bytecode engineering toolkit

Decompiler from Java bytecode to Java, used in IntelliJ IDEA.

A cross-version Python bytecode decompiler

A bytecode optimizer for Android apps

Interpreter framework for Lisp-based extension and scripting languages on macOS and iOS. LispKit is based on the R7RS standard for Scheme. Its compiler generates bytecode for a virtual machine. LispKit is fully implemented in Swift 5.

A dynamic language and bytecode vm

Framework to interpret and transpile JVM bytecode to JavaScript, OpenCL or WebAssembly.

SPIRV-Reflect is a lightweight library that provides a C/C++ reflection API for SPIR-V shader bytecode in Vulkan applications.

Zig implementation of Crafting Interpreters bytecode lox interpreter

Dialect of Python with explicit variable declaration and block scoping, with a lightweight and easy-to-embed bytecode compiler and interpreter.

EVMole is an open-source library that analyzes deployed EVM bytecode to infer function selectors, argument types, state mutability, persistent and transient storage layout, control flow, and compiler metadata, including for unverified contracts

Compile Rust to Java bytecode and runnable JARs.

Java agent framework for Project Zomboid that enables runtime bytecode patching using ByteBuddy. Annotation-based API for modding game classes without source code access.

Pure Zig implementation of Jinja2 templating. Bytecode compilation, 40+ filters, template inheritance, macros, autoescaping, and sandboxing. Built for HuggingFace ML pipelines and high-performance applications.

Single-pass SSA compiler and bytecode VM for a sandboxed Python subset. NaN-boxed values, dual inline caching (scalar + instance-dunder), super-instruction fusion, pure-function memoization, mark-sweep GC; classes with inheritance and dunder protocol, stackful coroutines with async/await, pattern matching, and packages.json imports. 170 KB WASM.