Best open-source JavaScript projects

Open-source macOS and Windows AI copilot that floats over your screen, listens to meetings, and stays hidden from screen shares, using your own API key.

A web desktop operating system that runs in a browser on low-power hardware such as Raspberry Pi, providing file management and NAS-style storage.

A self-hosted notes app in a single Go binary, storing notes as Markdown files alongside a local SQLite database.

Self-hosted audiobook and podcast server with multi-user support, progress syncing, and a web app plus Android and iOS clients.

A cross-platform ebook reader and manager with sync, backup, and support for EPUB, PDF, MOBI, comics and more.

A browser-based screen recorder that needs no native installation, capturing screen, microphone and desktop audio.

Browser extension for reverse image search that lets you find where an image appears online across more than 30 search engines.

Self-hosted intelligence dashboard that aggregates 27 open-source data feeds into one map-based view and sends alerts to Telegram or Discord.

Browser-based previs studio for blocking scenes, posing characters, and cutting camera moves, then exporting shots to AI video models.

A lightweight Windows teleprompter built with Rust and Tauri, with an always-on-top reading overlay, voice tracking, and optional Groq-powered script generation.

A self-hosted gym and body-weight tracker for planning routines, logging workouts and tracking progress, with passkey login and data kept on your own server.

Windows remote control app that lets you lock, shut down, restart, sleep your PC and launch apps from a phone over local Wi-Fi.

A privacy-first PDF toolkit that edits, converts, merges, and secures PDFs entirely in the browser, and can be self-hosted as static files.

A Zotero plugin that lets you chat with one PDF, several PDFs, or your whole library, with clickable citations and optional fully local models.