My FocusTab от encryxed

FocusTab is a calm little dashboard that lives in your browser toolbar. Click the icon and get a live clock with a time-based greeting, a simple focus list for your to-dos (each with an optional timer that reminds you), and a rotating quote of the day.

The standout feature is "Remind me about a tab" — drag any open tab in, pick a time (in 1 hour, this evening, tomorrow, or a custom date/time), and FocusTab will notify you, pop open a reminder window, and play a soft chime when it's due.

Fully private — no accounts, no tracking, no servers. Everything stays on your device. Includes six themes (System, Light, Dark, Midnight, Forest, Rosé) and supports both 12-hour and 24-hour time formats.

Free and open source (MIT license).