Complete products you can run yourself, inspect closely and adapt with your own operational tradeoffs.
3 long-form field guidessyncthing / syncthing
The repository builds continuous device-to-device folder synchronization around explicit device identities, encrypted transport and block exchange. Its convenience does not make deletion, conflict or recovery someone else's problem.
AppFlowy-IO / AppFlowy
The Flutter and Rust repository covers far more than a notes editor. Documents, structured work, sync and AI-oriented features create a broad workspace whose self-hosting story deserves an operational reading.
huginn / huginn
The self-hosted Rails application can watch, transform and act on online information. Its durable lesson is not a long connector list, but a visible event contract between small pieces of automation.