Strong.app - Strenght training logger.

FitHero - Track your workouts without distractions 💪.

Strongify - Strongify is the easiest workout tracker app. Enter the number of reps and the weight you lifted in just a few taps. Create any exercise that you want and track your progress over time.

Stacked - A workout tracker actually worth using

wger - FLOSS workout, fitness and weight manager/tracker written with Django

gymConsole - Workout tracker for hackers. Log everything the way you want