turtl

A secure, collaborative notebook that lets users store bookmarks, passwords, files, shopping lists and other personal data in an organized way. Items are grouped in “Spaces,” can be tagged, and are searchable via text queries. Notes support Markdown formatting for easy writing and reading.

All data is encrypted with high‑end cryptography, ensuring that only the owner and explicitly granted collaborators can access the content. The core library has been audited, and users may run their own server to retain full control over storage and synchronization across devices.

The application targets individuals and small teams who need a private, cross‑platform solution for managing and sharing sensitive information. It is available for macOS, is open‑source, and offers a stable, community‑driven experience without requiring a paid service.