What are some alternatives?
PostgreSQL - PostgreSQL is a powerful, open source object-relational database system.
LibreOffice - Base - Base, database, database frontend, LibreOffice, ODF, Open Standards, SQL, ODBC
SQLite - SQLite Home Page
Cellica Database - Read and write to your databases without any programming changes.
MongoDB - MongoDB (from "humongous") is a scalable, high-performance, open source NoSQL database.
MariaDB - An enhanced, drop-in replacement for MySQL