ERPNext is a comprehensive open-source ERP (Enterprise Resource Planning) system built on the Frappe Framework. It provides a full suite of business management modules including Accounting, CRM, Buying, Selling, Stock/Inventory, Manufacturing, Projects, Assets, Quality Management, Support, and more. The system uses a metadata-driven architecture where DocTypes (document types) define data models, business logic, and UI behavior. The codebase follows a modular structure with each business domain in its own directory (accounts, buying, selling, stock, manufacturing, projects, etc.). It includes a modern React/TypeScript banking module built with Vite for bank reconciliation and statement importing. The system supports multi-company, multi-currency, multi-language deployments with extensive regional/localization support for tax compliance across many countries. It has a robust patch/migration system for database schema evolution and a comprehensive test suite.
ChimeraOS is a build system for creating a custom Arch Linux-based operating system image tailored for gaming consoles. It provides a set of shell scripts, configuration files, and GitHub Actions workflows to assemble a complete system image with Steam, RetroArch, gamescope, and other gaming-related packages. The build process uses a Docker container to create a reproducible environment, installs packages from Arch repositories and the AUR, applies custom configurations, and produces a compressed Btrfs image. The repository includes scripts for session management, hardware quirks, and system migrations, all designed to create a console-like experience on PC hardware. It is not a runtime application but a build toolchain, and the code is well-structured for its purpose, with several reusable utility scripts and migration patterns.