LVGL (Light and Versatile Graphics Library) is an embedded GUI library written in C, providing a comprehensive widget toolkit (30+ widgets), style system, layout managers (flex, grid, split), animation framework, and multiple rendering backends (software, GPU-accelerated via VG-Lite, NanoVG, OpenGL ES, and hardware-specific backends for various MCU/MPU platforms). It is designed for resource-constrained devices with a small memory footprint (~100kB RAM for typical UIs) and supports a wide range of display drivers (SDL, Wayland, DRM, UEFI, Windows, and many embedded display controllers) and input devices (touch, keypad, mouse, gestures). The library features a public/private header pattern for encapsulation, a configurable build system via Kconfig, extensive Unity-based test suites with screenshot comparison, and a GDB plugin for runtime introspection. It is actively maintained with frequent commits, comprehensive CI/CD, and a large ecosystem of examples and demos.
FUXA is a full-stack web-based SCADA/HMI builder and runtime for industrial automation and IoT. It provides a visual editor (Angular + SVG) to create real-time dashboards, connect to field devices via 13+ protocols (Modbus, OPC UA, BACnet, Siemens S7, MQTT, etc.), and manage alarms, data acquisition (DAQ), scripting, scheduling, and user permissions. The backend (Node.js/Express) communicates with the frontend via Socket.IO for real-time device value updates. The system supports multiple time-series databases (SQLite, InfluxDB, QuestDB, TDengine) and can be deployed as a web server, Docker container, or Electron desktop app. It also integrates with Node-RED for low-code automation flows. The architecture is modular with a device driver factory pattern, JWT-based authentication, and a plugin system for extensibility. While the codebase is large and contains some monolithic components, it demonstrates solid engineering practices and has a rich set of reusable UI components and utility patterns.