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A collection of DESIGN.md files analysis by popular brand design systems. Drop one into your project and let coding agents generate a matching UI.

Leaked system prompts of ChatGPT, Claude, Gemini and more. The hidden system prompt of every popular chatbot, in full, every version since May 2025. Also Anthropic Claude Code, OpenAI Codex, Google Antigravity, xAI Grok, Meta Muse, Moonshot Kimi, Alibaba Qwen, Z.ai GLM ZCode, MiniMax, Cursor, Perplexity, DeepSeek and 30+ others. Updated daily.

The most popular HTML, CSS, and JavaScript framework for developing responsive, mobile first projects on the web.

A desktop GUI for CLIProxyAPI and a tool for automatically configuring popular AI agents.

🌼 🌼 🌼 🌼 🌼  The most popular, free and open-source Tailwind CSS component library

Kilo is the all-in-one agentic engineering platform. Build, ship, and iterate faster with the most popular open source coding agent.

LangChain4j is an idiomatic, open-source Java library for building LLM-powered applications on the JVM. It offers a unified API over popular LLM providers and vector stores, and makes implementing tool calling (including MCP support), agents and RAG easy. It integrates seamlessly with enterprise Java frameworks like Quarkus and Spring Boot.

A Minecraft Launcher which is multi-functional, cross-platform and popular

SVG icons for popular brands

A standard API for single-agent reinforcement learning environments, with popular reference environments and related utilities (formerly Gym)

MySQL Server, the world's most popular open source database, and MySQL Cluster, a real-time, open source transactional database.

Open Source Point of Sale is a web based point of sale application written in PHP using CodeIgniter framework. It uses MySQL as the data back end and has a Bootstrap 3 based user interface. If you like this project, please give it a star! Doing so helps maintain Popular OSS status for the project.

Ubuntu, Alpine, Arch, Debian, and Fedora based Webtop images, Linux in a web browser supporting popular desktop environments.

👩‍💻👨‍💻 Awesome cheatsheets for popular programming languages, frameworks and development tools. They include everything you should know in one single file.

Popular Simple Open Source Online Judge based on PHP/C++/MySQL/Linux for ACM/ICPC and NOIP training, with easy installation. 简单实用的开源OJ系统

A browser extension that redirects popular sites to alternative privacy friendly frontends

WinSCP is a popular free file manager for Windows supporting SFTP, FTP, FTPS, SCP, S3, WebDAV and local-to-local file transfers. A powerful tool to enhance your productivity with a user-friendly interface and automation options like .NET assembly.

Collection of sample apps showcasing popular use cases using Cloud Functions for Firebase

Most popular Mocking framework for unit tests written in Java

A standard API for multi-agent reinforcement learning environments, with popular reference environments and related utilities

Bforartists is a fork of the popular 3D software Blender, with the goal to improve the UI.

A personal booru-style media tagger that can import files and tags from your hard drive and popular websites. Content can be shared with other users via user-run servers.

An application observability facade for the most popular observability tools. Think SLF4J, but for observability.

:pancakes: The most popular pytest snapshot plugin

Popular Kubernetes CRDs (CustomResourceDefinition) in JSON schema format.

The internet's most popular open-source dating app

📊 A table to sort, filter and discover popular F-Droid apps

Popular list of Homebridge Plugins

The most popular PHP library for use with the Twitter OAuth REST API.

The most popular open source electronic health records and medical practice management solution.