Strong.app - Strenght training logger.
Fitness Pro - Fitness Pro 2.0 contains an impressive library with over 450 different exercises.
wger - FLOSS workout, fitness and weight manager/tracker written with Django
JEFIT - Jefit is the #1 popular gym workout app for Android and iOS. Jefit allows you to manage your training routine and keep track of your workout progress easily.
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.
STRAFFR - We talked to Stefan Weiss of STRAFFR about the intelligent fitness band and here is what he said about it .