OpenNotas
Open‑source, cross‑platform note‑taking with sync and end‑to‑end encryption
OpenNotas is a free, open‑source note‑taking app built as a progressive web app. It runs on Windows, macOS, Linux, iOS, Android and browsers, offering a lightweight interface that lets you start writing instantly. Built‑in sync adapters keep your notes consistent across devices, while AES‑based end‑to‑end encryption ensures your data stays private. Offline access, automatic backup, and a minimal settings layout make it ideal for anyone who wants a fast, secure personal notebook.