MySQL Community Edition is the freely downloadable version of the world's most popular open source database.

Transpose is a CRM solution.

Oracle Database (Oracle RDBMS or simply as Oracle) is an object-relational database management system.

Vertabelo is an online tool for database design.

Firebird is a relational database offering many ANSI SQL standard features.

SQLite is an in-process library that implements a self-contained, serverless, zero-configuration, transactional SQL database engine.

Enhanced SQL Portal is a full featured MySQL database.

Apache Cassandra is a free and open-source distributed NoSQL database management system.

H2 Database Engine is a relational database management system written in Java.