MySQL - The world's most popular open source database
Fitbod - Personalized Strength-Training powered by Machine Learning
PostgreSQL - PostgreSQL is a powerful, open source object-relational database system.
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.
SQLite - SQLite Home Page
Strong.app - Strenght training logger.