SQLite is described as 'Software library that implements a self-contained, serverless, zero-configuration, transactional SQL database engine. SQLite the most widely deployed SQL database engine in the world. The source code for SQLite is in the public domain' and is a very popular relational database in the development category. There are more than 50 alternatives to SQLite for a variety of platforms, including Windows, Linux, Mac, Self-Hosted and Web-based apps. The best SQLite alternative is PostgreSQL, which is both free and Open Source. Other great apps like SQLite are MySQL Community Edition, MariaDB, MongoDB and Microsoft SQL Server.