open ms sql database

Open source, enterprise-level database server.

Industry-leading open-source SQL database.

SQL database connection development library.

SQL database development environment.

Relational database offering many ANSI SQL-92 features.

iSQL-Viewer is an open-source JDBC 2/3 compliant database front end.

PostgreSQL is a powerful, open source object-relational database system.

Microsoft Query X for Mac uses Open Database Connectivity (ODBC).