A simple task reminder using electronjs, sqlite3, node-scheduler, and node-notifier. The application can be downloaded and used as an regular desktop app.
User will be able to use it as a simple reminder app. The app can be minimized or hide (something similar to telegram on desktop). When, the time is up for a reminder, a notification will be fired and a pop-up will appear on user screen (given they didn't disable the notification on their machine).
You can take a look at the demo here