Open-source alternatives to Asmjit

ChakraCore is an embeddable JavaScript engine and high-performance scripting runtime. It provides a just-in-time compiler that converts JavaScript source code into optimized machine code during runtime to increase execution speed and throughput. The engine utilizes a multi-tiered compilation pipeline and tiered machine code generation to balance startup time with execution speed. Memory is managed via a concurrent garbage collector that reclaims unreachable objects on background threads to minimize application pauses. The project provides capabilities for embedded JavaScript execution and au

Lucet is a WebAssembly runtime and sandboxing compiler that translates WebAssembly bytecode into native machine code. It serves as a secure execution environment and native code generator designed to run untrusted code while preventing unauthorized access to host system resources. The project focuses on high-performance sandboxing by using ahead-of-time compilation to achieve near-native execution speeds. It implements software-based fault isolation and a host-call interface to manage secure communication and data exchange between the isolated module and the external host application. The sy

Dobby is a dynamic function hooking framework and binary instrumentation tool designed to intercept and redirect function calls in compiled binaries. It serves as a cross-platform and cross-architecture library that provides a unified interface for modifying program execution flow across different operating systems and CPU architectures. The library enables low-level binary instrumentation and runtime application instrumentation by injecting custom handlers into live processes. It is used for software reverse engineering to observe real-time data flow and logic by hooking internal functions.

Objection is a dynamic instrumentation framework and runtime exploration toolkit for mobile application security analysis. It provides a command-line interface to interact with the memory and state of iOS and Android applications during active execution, serving as a toolkit for runtime analysis and security testing. The project distinguishes itself by providing specialized capabilities to bypass common mobile security controls, including SSL pinning, biometric authentication, and root or jailbreak detection. It enables the extraction of sensitive credentials and data from secure storage syst

Task is a YAML-based task runner and build tool used to define and automate development workflows. It functions as a dependency-based build system and cross-platform task automator, allowing users to execute shell commands across different operating systems using a declarative configuration file. The project operates as an incremental build tool, utilizing file fingerprints and checksums to track state and avoid redundant work by determining if tasks are up to date. It manages execution via a dependency graph to ensure prerequisites are completed before target commands run. The system includ

Unicorn is a multi-architecture CPU emulation framework and library that utilizes just-in-time compilation to execute instructions across various processor architectures, including ARM, x86, and RISC-V. It functions as both a JIT compilation engine and an instrumentation tool, allowing for the execution of machine code without the need for physical hardware. The framework is distinguished by its hook-based execution instrumentation, which enables the interception of specific instructions and memory accesses to trigger custom callback functions. It provides a language-agnostic binding layer an

Blink is a JIT-based instruction emulator and x86-64 Linux emulator designed to run Linux binaries and ELF files across different host operating systems and architectures. It functions as a binary execution sandbox and system call simulator, providing a controlled environment for running programs. The project distinguishes itself with a terminal user interface for monitoring execution, managing breakpoints, and visualizing JIT compilation paths. It supports self-modifying code through a cache-invalidating memory model and provides execution environment isolation using restricted directory ove

CoreCLR is a runtime environment that manages the execution, memory, and basic types for applications built on the .NET platform. It serves as a managed execution environment that handles low-level system interactions and provides primitive data types for high-level application code. The project functions as a JIT compilation engine and a garbage collected runtime. It translates intermediate language into machine code at runtime for execution on specific hardware and automatically reclaims unused memory to prevent leaks. The system covers broad capability areas including managed code executi

V8 is a high-performance JavaScript and WebAssembly engine designed to compile and execute code within host applications. It functions as an embeddable scripting engine and just-in-time compiler, providing a portable library for integrating dynamic script execution into native software environments. The engine incorporates a WebAssembly runtime to execute compiled binary code for a stack-based virtual machine at near-native speeds. It enables native application scripting by allowing a JavaScript execution environment to be embedded directly into a native program to handle dynamic logic. The

Cling is an interactive C++ interpreter and read-eval-print loop that allows for the execution of C++ code in real time. It provides an interactive environment where statements can be evaluated immediately, bypassing the manual compilation and linking cycles typically required for the language. The system functions as a Jupyter C++ kernel, enabling cell-based development and visualization within notebook interfaces. It also supports the loading and execution of external source files within an active session. The environment includes capabilities for just-in-time debugging and profiling by em

LLVM is a modular compiler infrastructure and framework consisting of a collection of reusable libraries used to build language front-ends and optimization tools. It functions as a low-level virtual machine that provides an intermediate representation and optimization pipeline to enable language-agnostic code generation. The project provides a toolkit for just-in-time compilation, translating intermediate representations into machine code at runtime for immediate execution. Its modular design allows developers to create custom language front-ends and high-performance runtime environments acro

Pyston is a high-performance Python language implementation and JIT compiler. It functions as a runtime environment that executes Python code while maintaining compatibility with the standard language specification. The project accelerates execution by translating Python bytecode into native machine code during program execution. It utilizes a multi-tier compilation pipeline and adaptive execution optimization to transition from interpretation to compiled code based on runtime behavior. This implementation maintains binary compatibility with the standard Python C API to support native extensi

FreeRTOS is a real-time operating system for embedded devices that provides a kernel for predictable task execution. It utilizes priority-based preemptive scheduling and deterministic timing to manage simultaneous hardware tasks. The project includes a symmetric multiprocessing kernel that distributes processing workloads across multiple CPU cores using a shared memory architecture. It also provides a thread-safe TCP/IP networking stack for managing internet protocol traffic and IPv6 connectivity on embedded processors. The system incorporates an embedded memory manager with fixed-size alloc

This project is a compiler development tutorial that provides a series of guides and exercises for building a complete compiler from scratch. It focuses on the implementation of a structured compilation pipeline to transform high-level source code into executable machine instructions. The project covers the creation of a machine code generator for specific processor architectures and a static analysis framework. This framework includes methodologies for implementing type checking and constant folding to verify logic correctness before the final execution phase. The instructional material enc

xv6-riscv is a simplified Unix-like teaching operating system designed for the study of kernel design and hardware interaction. It provides a low-level RISC-V kernel implementation that serves as a bootable system image for execution and debugging within a virtual machine or emulator. The project focuses on educational instruction regarding the RISC-V architecture. It enables the study of operating system concepts through a minimal kernel that implements process management and memory handling. The system covers core kernel operations including multiprocessor resource management and the imple

bflat is a native compiler and ahead-of-time binary generator for C#. It transforms source code into self-contained native executables and machine code that run without requiring a separate runtime environment. The project features a cross-platform native toolchain capable of generating binaries for multiple operating systems and architectures from a single environment. It includes a mechanism for exporting C# logic as shared native libraries via a foreign function interface for integration with other programming languages. To support resource-constrained environments, it provides a binary o

WasmEdge is an extensible WebAssembly runtime that executes WebAssembly bytecode in a secure sandbox for cloud, edge, and embedded applications. It functions as a multi-language compiler, compiling applications written in Rust, JavaScript, Go, and Python into WebAssembly bytecode for sandboxed execution, and as a server-side JavaScript runtime that runs JavaScript programs with ES6 modules, NPM packages, and Node.js-compatible APIs. The runtime also serves as an AI inference runtime, executing AI models from JavaScript using WASI-NN plug-ins for inference tasks on personal devices and edge har

Binaryen is a WebAssembly compiler toolchain and optimizer designed to transform, validate, and shrink binary modules. It provides a comprehensive intermediate representation framework that converts binary code into a single-assignment form to enable advanced program analysis and code transformation. The project includes a specialized transformation engine that applies iterative optimization passes to increase execution speed and reduce binary size. Additionally, it functions as a transpiler that translates WebAssembly binary modules into executable JavaScript for environments that lack nativ

PyMC is a Bayesian probabilistic programming framework used for building probabilistic models and performing Bayesian inference. It provides a probabilistic graphical model library for specifying random variables, priors, and likelihood functions, supported by an MCMC sampling engine and variational inference tools to estimate posterior distributions. The framework features a GPU-accelerated inference backend that compiles models into machine code to increase execution speed. It utilizes a backend-agnostic tensor execution model and just-in-time graph compilation to optimize the computation o

Cosmopolitan is a cross-platform C runtime library and build framework that enables the creation of single-file, self-contained executables. By providing a unified set of system headers and a specialized compiler toolchain, it allows developers to write low-level systems code that executes natively across multiple operating systems without requiring recompilation for each target environment. The project utilizes a polyglot binary format and a system call shimming layer to intercept and translate kernel requests, effectively bypassing standard library dependencies. This approach consolidates a

FlutterFire is a set of plugins and libraries that provide a Firebase SDK for applications built with the Flutter framework. It functions as a cloud services wrapper that maps Firebase cloud APIs to the Dart programming language, enabling backend integration for cloud data storage, user authentication, and serverless function execution. The project uses a plugin-based modular architecture to separate different cloud services into independent packages. It employs platform-interface abstractions and method-channel-based native interoperability to communicate with native Android and iOS SDKs thr

WeChatOpenDevTools-Python is a set of software utilities designed to bypass environment restrictions to enable debugging and element inspection for web and mini program applications. It functions as a developer tool unlocker and web inspector activator to force the activation of integrated inspection tools. The project provides specialized capabilities for debugging and reverse engineering WeChat mini programs. This includes the ability to access hidden developer consoles to analyze the structure, network requests, and behavior of active mini programs and web content. These utilities utilize

Bettercap is an extensible framework for network security testing that provides a unified interface for performing man-in-the-middle attacks, network reconnaissance, and traffic manipulation across WiFi, Bluetooth, and wired networks. It operates through a modular attack module system that loads and executes interchangeable offensive or diagnostic modules, supported by event-driven session management and multi-protocol network spoofing capabilities. The framework distinguishes itself by covering a broad range of network domains, including Bluetooth Low Energy scanning and enumeration, CAN-Bus

This repository is a curated collection of official Dart packages and Flutter plugins maintained by the framework creators. It serves as a centralized source of modular code libraries and verified extensions designed to provide standardized access to native device hardware and operating system APIs. The collection provides cross-platform UI component libraries that ensure consistent interface elements and widgets across different operating systems. These official plugins integrate standard features into applications through a set of maintained libraries. The project covers a broad range of c

go-fuzz is a coverage-guided randomized testing tool for identifying crashes and logic bugs in Go code. It consists of a fuzzer that evolves random inputs based on code execution paths, an instrumentation tool that produces binaries for tracking coverage, and a seed corpus manager. The tool utilizes compile-time binary instrumentation to monitor branch coverage and employs a feedback-driven mutation loop to prioritize inputs that reach new sections of the codebase. It includes capabilities for comparative differential testing to identify logic errors by executing different implementations of

Fishhook is a binary instrumentation library for iOS and iOS simulators. It functions as a Mach-O symbol rebinder and instrumenter, allowing for the replacement of system library implementations with custom logic at runtime. The project redirects function calls by updating lazy and non-lazy symbol pointers within Mach-O binary data segments. This approach enables the interception and modification of existing function behavior without altering the original binary on disk. The toolset covers binary instrumentation and dynamic hooking for iOS applications, facilitating the monitoring and altera