Best open-source JavaScript projects

An MCP server that lets AI agents launch the Godot editor, run projects, capture debug output, and manage scenes.

Swagger UI renders interactive API documentation in the browser from an OpenAPI/Swagger specification file.

A JavaScript library and CLI that converts JS source code into SVG flowcharts, with abstraction levels, code-block modifiers and themes.

A high-performance JavaScript library for building interactive web maps that display tiles, vector data and markers from any source.

A forensic tool that processes, analyzes and visualizes Google Chrome browsing artifacts such as history, logins, downloads and cache.

A free, self-hosted note-taking app with rich text and Markdown notes, task lists, a diary, and sharing, offered as an alternative to Notion and Obsidian.

Web app for running DeepSeek-OCR on images and PDFs, with a React frontend, FastAPI backend and Docker setup.

Self-hosted, Docker-deployed video surveillance (NVR) system for IP cameras with motion detection, AI object detection, and local storage.

A client-side web app that turns any searched location into a customizable, high-resolution map poster with themes, layouts and PNG export.

A minimal vanilla JavaScript library for building draggable, snapping flowchart editors in web apps.

A desktop music player built with Electron that streams audio from YouTube Music, with no accounts and no ads.

A browser-based cloud terminal and ACP agent workspace with persistent sessions, file editing, and multi-host access, usable from desktop, tablet, and phone.

A free, open-source component library that adds ready-made UI components as class names on top of Tailwind CSS.

Self-hosted web gallery for browsing personal photos and videos, with tagging, mobile-friendly UI, and similar-image and face search.

Electron-based screenshot and annotation app that lets AI coding agents like Claude Code render diagrams and previews for visual review.

Open-source, local-first video editor that runs in the browser, combining a multi-track timeline with on-device AI voiceover, captions, music and repair.

A browser built for AI agents and you to share: agents run tasks in isolated Spaces while your own tabs and logins stay untouched.

A zero-knowledge, end-to-end encrypted pastebin where notes are encrypted in the browser and self-destruct after one read or 24 hours.

A local-first desktop writing assistant that proofreads, rewrites, and formats drafts on your own machine without an account.

Open-source memory layer that turns agent task outcomes into editable Markdown skill files shared across agents and LLMs.