GridStack.js is a production-grade TypeScript library for building responsive, drag-and-drop dashboard layouts. The core GridStack class manages widget lifecycle, DOM placement, responsive column switching, nested grids, serialization, and eventing, while GridStackEngine performs collision and positioning math without touching the DOM. The library ships its own drag-and-drop subsystem rather than depending on HTML5 drag-and-drop or jQuery, and it has zero runtime dependencies. Architecturally, the repository is a multi-package collection: a framework-agnostic core, a SCSS styling layer, and official Angular, React, and Vue wrappers. The wrappers integrate through callback hooks such as addRemoveCB, saveCB, and updateCB, plus DOM-stamped host APIs, allowing each framework to dynamically create and destroy widgets while keeping item content mounted during cross-grid drags. Demo applications under demo/, angular/projects/demo, react/src, and vue/src exercise the public API and serve as integration references. The project is actively maintained with a comprehensive Vitest and Playwright test suite, issue-numbered regression tests, and frequent releases. Its main technical debt is the large monolithic gridstack.ts (roughly 3100 lines) and the need to keep three framework wrappers synchronized with core API changes. The Angular wrapper is intentionally pinned to an older Angular major and some legacy build artifacts remain, but the core engine/UI separation, clean utility layer, and callback-based framework integration make many parts genuinely reusable.
GridPlayer is a desktop application that plays multiple video streams simultaneously in a configurable grid layout. Built with PyQt5 and backed by VLC (libvlc), it provides per-video controls (play/pause, seek, speed, zoom, crop, loop, transformation), full playlist management with snapshots, and support for streaming via yt-dlp and Streamlink. The architecture uses a modular Manager pattern (ManagersManager, ManagerBase) where each subsystem (menu, grid, settings, video drivers, drag-and-drop, etc.) is a QObject-based manager registered with a shared Context/Commands dispatcher. Video playback can run in separate processes via multiprocessing with shared memory for hardware-accelerated decoding. The application is cross-platform (Windows, macOS, Linux) with packaging for PyPI, AppImage, Flatpak, Snap, and Chocolatey. Internationalization is handled via Crowdin with 18 translation files. Entry point is gridplayer/__main__.py which initializes the application, VLC instance, and main Player widget. The codebase demonstrates solid software engineering practices with extensive test coverage for core components like grid layout, drag-and-drop, settings, and keymap management. However, it carries significant technical debt from heavy reliance on VLC 3.0.x, PyQt5 (no migration to Qt6), and complex cross-platform workarounds for Wayland, X11 overlay, and hardware decoder multiprocessing.