Strong.app - Strenght training logger.
wger - FLOSS workout, fitness and weight manager/tracker written with Django
The Fit Tutor - The Fit Tutor is a membership community dedicated to efficient and effective workouts for all...
Tinygain - Create, discover and develop productive daily routines.
Liftosaur - Free weightlifting tracking app where you can code
HomeFitness OS - The all-in-one fitness system for Notion