https://github.com/opsMachine/notion-calendar-linux

Nothing earth shattering but I just moved from windows and was missing this.

Notion Calendar in Electron, aimed at Linux: minimize-to-tray instead of quit, calendar notifications routed through notify-send/libnotify (with join/default actions where the payload allows), window state, and a tightened main/preload setup (sandbox, context isolation, navigation limits). Tested on Ubuntu 24.04 + KDE; no macOS/Windows builds.

Upstream: https://github.com/dusansimic/notion-calendar