There are 2 repositories under fitbit-sense topic.
Fitbit Homeassistant App
Unofficial approach for sideloading an app onto Fitbit Versa 4 (and possibly Sense 2) devices
A clock face compatible with Fitbit Sense and Versa 3 that shows a couple of info. It was made by eye so don't mind the position of the UI elements and some weather icons on the clock. With HTML & a touch of JS
An app for fitbit that serves as a ligtht
Clockface Fitbit Versa 3 and Sense
Fitbit Clockface
Nyan Cat Clockface for Fitbit Sense & Versa 3
Two-factor authentication app for Fitbit smartwatches.
Fitbit APP For Sense, Versa 3, Versa 2, and Versa
Clockface for Fitbit
A simple altimeter for Fitbit Versa 3 and Fitbit Sense
Fitbit Clock Face for tracking imminent phase of day (e.g. Civil Twilight, Golden Hour, Astronomical Dusk etc.) by calculating sun position timings. GPS connection required. Compatible with Fitbit Sense and Fitbit Versa 3.
A Clockface for Fitbit
⏰ Soothing pastel clock face for the fitbit versa 3 and sense
The Fitbit Stats Watch Face.
Lesmills New Zealand timetable app for Fitbit devices.
A simple clock face for Fitbit Versa and Sense
A tiny RPN calculator on your wrist!
WIP: Source code of the Off Peak Hours Fitbit App
An intermittent fasting clockface for Fitbit smartwatches