MySQL - The world's most popular open source database
MiXplorer - MiXplorer is a mobile app that was designed to make it easy to organize and manage the files on your Android device.
PostgreSQL - PostgreSQL is a powerful, open source object-relational database system.
Solid Explorer - Solid Explorer is a powerful Android file manager featuring access to most popular cloud storages, root access and easy extensibility.
SQLite - SQLite Home Page
Sliding Explorer - Sliding Explorer is a free fast and stylish file manager app specially designed for those who want to manage their phone files easily and quickly.