Best open-source JavaScript projects

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

A cloud-native web 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 menu bar app that lets AI coding agents render diagrams and previews, and lets you annotate and approve them on screen.

Open-source, local-first browser video editor with a multi-track timeline, in-browser AI voiceover, music, captions 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.

Self-destructing, end-to-end encrypted pastebin: notes are encrypted in the browser with AES-256-GCM and vanish after one read or 24 hours.

A local-first desktop writing assistant that proofreads, rewrites, and exports drafts without sending text to any server.

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

A modular runtime and orchestration system that coordinates AI coding agents through gated pipelines for tasks, review, shipping and docs across Claude Code, Codex, Cursor and more.

A free, independent three-level guide to Claude Code, from first session to unattended multi-agent runs, with checked exercises.

Renders every road in a chosen city at once as a map-style visualization, using OpenStreetMap data in the browser.

An agent skill that generates a scroll-scrubbed 3D landing page where the camera flies from outside each scene into its interior, with no cuts.

Offline, zero-permission Android file viewer for PDF, Word, Excel, PowerPoint, photos, video, audio, Markdown, code and ZIP archives.

A hands-on tutorial that teaches AI agent building from scratch with local LLMs via node-llama-cpp, covering function calling, memory and ReAct.

A step-by-step educational project that builds Retrieval-Augmented Generation from scratch in JavaScript using local LLMs and no cloud APIs.

An Agent Skill that lets coding agents write and run custom Playwright browser automation scripts for tests and multi-step web tasks.

A curated, community-maintained list of plugins for DeepSeek Harness (dsh), a coding agent built on a plugin-based framework.

A catalog of 28 portable Agent Skills that give Claude Code, Copilot, Codex and Cursor structured reasoning procedures for decisions, diagnosis and risk.