Open-source alternatives to Harmony

Epic is a toolkit for Android runtime instrumentation, method interception, and security posture auditing. It functions as an aspect-oriented programming framework and a dynamic method interceptor designed to monitor and alter the behavior of Java methods within the Android Runtime. The project provides capabilities for intercepting and modifying both core Android framework components and specific application logic. This allows for the injection of custom Java behavior and the redirection of method execution without altering the original source code. The framework includes tools for applicat

Object-reflector is a Python object reflection library and dynamic attribute access tool. It functions as an object property extractor designed to retrieve values from an object's internal state and inheritance hierarchies during runtime. The library provides the capability to access and extract private, protected, and inherited object attributes. This allows for the inspection of internal properties regardless of their visibility. The project covers domains including software debugging workflows, automated testing utilities, and general Python runtime reflection to analyze object properties

Powermock is a Java mocking framework and unit testing tool that uses bytecode manipulation to mock static methods, final classes, and private constructors. It includes a Java agent instrumentation tool and a reflection-based testing utility to bypass encapsulation and modify class behavior at runtime. The project distinguishes itself by providing the ability to intercept the instantiation of objects via the new keyword and simulate the behavior of core Java system classes and native methods. It can override final modifiers on classes and methods and bypass signature restrictions for classes

SpringSide 4 is an enterprise Java reference architecture and utility library built on the Spring Framework. It provides a pragmatic, best-practice application stack for building RESTful web services, web applications, and data access layers, along with a curated collection of high-performance utility classes for common operations like text, date, collection, reflection, concurrency, and I/O handling. The project distinguishes itself by combining a complete reference application scaffold with production-oriented infrastructure. It includes a JPA-based data access layer that automatically tran

This repository is a collection of technical knowledge and solutions focused on mobile application development, particularly for Android and iOS platforms. It covers a wide range of practical engineering challenges, including hotfix and patching techniques, database management and repair, network communication, logging, and video processing. The content is presented as shared knowledge, documenting real-world problems and their implementations. The project provides detailed guidance on applying hotfixes to running Android applications through multiple methods, such as class replacement, full

AndFix is a binary patching framework and update system for Android applications. It provides tools for generating binary diffs and applying runtime method replacements to fix bugs without requiring a full application update. The system utilizes a binary diff generator to isolate minimal code changes between package versions. It supports the consolidation of multiple incremental patches into a single update file and employs native hooks to replace specific method implementations in memory during the application initialization phase. The framework covers capabilities for binary patch generati

Robust is an Android hotfix framework and runtime application updater designed for patching bugs in production environments. It functions as a bytecode patcher and dynamic code injection tool, allowing for the modification of application logic without requiring a full app update or device reboot. The project enables the remediation of Android defects by injecting new classes and methods into existing builds and modifying the implementations of existing methods. It utilizes a toolchain to generate binary patch files that update application behavior and introduce workarounds on the fly. The sy

tModLoader is a modding framework and toolset designed for expanding game content and extending core game logic. It provides a polymorphic content API that allows for the creation of new items, NPCs, projectiles, and world assets through object-oriented inheritance. The project is distinguished by its advanced code modification capabilities, utilizing intermediate language bytecode patching and reflection-based private access to alter internal game behavior. It features a hot-reloading assembly runtime that enables developers to recompile and apply source code changes in real-time without res

dnSpy is a specialized suite of tools for the reverse engineering of .NET assemblies, functioning as a decompiler, assembly editor, and debugger. It translates compiled intermediate language back into high-level source code and provides an execution environment for stepping through compiled binaries to inspect runtime state without the original source files. The project includes a BAML decompiler that converts binary application markup language into a disassembled format and translates it into extensible markup language for user interface analysis. It also functions as a binary analysis tool

Javassist is a bytecode engineering toolkit for analyzing, modifying, and generating Java bytecode and class files. It functions as a bytecode manipulation library that allows for the editing of class files through either direct bytecode access or high-level source code syntax. The project provides specialized tools for the programmatic creation of new Java classes and interfaces during runtime. It includes a dynamic proxy generator for intercepting method calls and a class loader interceptor that automatically modifies class definitions as they are loaded into the Java Virtual Machine. Addi

BaiduNetdiskPlugin-macOS is a suite of macOS system extensions and tools designed to remove download speed limits and unlock premium features for the Baidu Netdisk client. It functions as a download speed unblocker and premium feature unlocker to enable maximum data transfer rates and activate SVIP status. The project includes a software update blocker that prevents the client from performing automatic updates to preserve the applied modifications. It achieves these results by removing local data transfer rate restrictions and eliminating trial duration limits.

BiliRoaming is an Android application modification module designed to enhance the official video streaming experience through runtime method swizzling and network traffic interception. It functions as a framework that injects custom logic into the host process to bypass regional playback restrictions and enable access to media content regardless of geographic location. The tool distinguishes itself by providing a comprehensive suite of features for media consumption and interface control. It enables users to download restricted content for offline viewing, suppress intrusive modal dialogs, an

This project is a Gradle plugin designed to facilitate aspect-oriented programming within Android applications. It functions as a build-time tool that intercepts method calls to inject cross-cutting logic, allowing developers to centralize concerns such as logging, security, or performance monitoring without modifying individual source files. The plugin distinguishes itself by its ability to perform binary dependency weaving, which applies instrumentation across both local source code and external library formats like JARs and AARs. By utilizing the Gradle Transform API, it integrates directl

Detours is a library for intercepting Win32 API calls and redirecting function calls at runtime on Windows, enabling binary-level instrumentation without requiring access to the original source code. It functions as an API hooking library and binary instrumentation toolkit, allowing developers to monitor or modify the behavior of compiled Windows binaries by hooking into their function execution paths. The project achieves this through detour-based function interception, where the first few instructions of a target function are replaced with a jump to a user-supplied detour function, while pr

Better Discord enhances Discord desktop app with new features.

BlocksKit is a low-level utility library for Apple platform development, specifically designed for managing the execution flow and memory of blocks within macOS and iOS applications. It provides a collection of helper functions to simplify the use of blocks in Objective-C and C, reducing boilerplate code and addressing inherent technical limitations. The library focuses on bridging Objective-C blocks with legacy C-based APIs by providing compatible wrapper structures and function-pointer emulation. It enables the passing of blocks through system interfaces that require strict C-style callback

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

xLua is a scripting bridge and C++ wrapper used to embed the Lua language into host applications. It facilitates bidirectional data exchange and function calls between scripts and the host environment. The project includes a runtime patching tool for replacing application logic and fixing bugs without requiring a system restart. It features a coroutine orchestrator that wraps asynchronous operations into linear code and a script validator that verifies digital signatures to ensure code authenticity and integrity before execution. To minimize memory overhead and garbage collection, the system

Matter-js is a 2D rigid body physics engine written in JavaScript for simulating realistic physical interactions, collisions, and dynamics in web browsers. It functions as a web physics simulation library that calculates motion, gravity, and constraints for objects rendered on a web canvas. The library includes a built-in canvas physics visualizer to draw physical bodies, joints, and constraints for debugging and gameplay. It distinguishes itself through a plugin system that supports recursive dependency resolution and internal method patching to inject custom logic into the engine's executio

QLExpress is a dynamic scripting engine and expression language for the Java platform. It functions as a runtime expression evaluator and business rule engine, allowing applications to execute scripts and evaluate business logic without requiring system recompilation. The engine distinguishes itself through a secure scripting sandbox that enforces security policies via class whitelisting and execution timeouts. It supports high-precision mathematics to prevent rounding errors and provides language alias support to create domain-specific languages that resemble natural language. Additional cap

Instantiator is a PHP library designed to create class instances without invoking their constructors. It uses the PHP Reflection API to allocate objects in memory and initialize them in a predefined state, bypassing standard constructor logic. The project functions as a data hydration tool and a testing helper. It enables the population of PHP objects from external data sources by mapping values directly to properties, regardless of whether those properties are public, protected, or private. This capability allows for the generation of objects in specific internal states for unit tests withou

RemoveAdblockThing is a browser extension that removes YouTube's adblock detection popup and skips video ads without triggering the platform's anti-adblock systems. It is designed to maintain an uninterrupted viewing experience by eliminating the intrusive "Ad blocker are not allowed on YouTube" message and automatically bypassing ad detection mechanisms. The extension works by injecting a content script at document_start to intercept and modify page behavior before YouTube's ad detection scripts run. It uses a DOM MutationObserver to monitor the YouTube DOM for ad-related elements and detect

This project is a multilingual educational framework that provides curated roadmaps and translated resources for mastering core computer science subjects. It serves as a Chinese translation of a structured guide designed to help students and engineers learn computer science fundamentals through a sequence of recommended books and courses. The framework focuses on technical content localization, converting English computer science roadmaps into Chinese to improve accessibility. It utilizes a manual translation workflow to ensure conceptual accuracy across its study guides and resource collecti

Quarkus is a Kubernetes-native Java framework designed for building high-performance, memory-efficient applications. It utilizes ahead-of-time native compilation to transform Java code into standalone, optimized binaries that eliminate the need for a virtual machine, enabling rapid startup and reduced memory consumption. By performing code augmentation during the build phase, it shifts heavy processing tasks away from runtime, ensuring that applications are optimized for cloud-native environments. The framework distinguishes itself through a unified approach to reactive and imperative program

Haxe is a statically typed, multi-target programming language and open-source compiler toolkit that translates a single codebase into native executables and scripts for JavaScript, C++, C#, Java, Python, Lua, PHP, and Flash targets. It provides a unified type system with automatic type inference, a compile-time macro system for code transformation and generation, conditional compilation directives, and a static analysis engine that enforces null safety and eliminates dead code to produce smaller, safer outputs. The language is supported by the HashLink virtual machine, which executes platform

This project is a comprehensive Java programming knowledge base and technical reference repository. It provides a curated collection of distilled answers, API documentation, and troubleshooting guides designed to help developers resolve common coding challenges and language pitfalls. The repository distinguishes itself through a structured architectural approach to knowledge, utilizing comparison-centric analysis to highlight trade-offs between different library implementations and language features. It aggregates high-impact community discussions into a standardized format, organizing techni