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.
Strong.app - Strenght training logger.
Fitness22 - Gym Workout Trainer & Tracker Gym Workout Trainer & Tracker
wger - FLOSS workout, fitness and weight manager/tracker written with Django
Gravitus - The app for lifters.
Tinygain - Create, discover and develop productive daily routines.