SQLite is a C-language library that implements a small, fast, self-contained, high-reliability, full-featured, SQL database engine. Learn more here
SQL Server Express Edition is a scaled down, free edition of SQL Server, which includes the core database engine. Learn more here
MS Access is a database management system (DBMS) from Microsoft that combines the relational Access Database Engine (ACE) with a graphical user interface and software-development tools. Learn more here