DBTarzan is a free and open source database viewer for Linux, MacOS and Windows. It is released under Apache 2.0 license. It supports Oracle, SQL Server, Derby, SQLite, MySQL and PostgreSQL databases. It comes with database connections editor to add, update and remove your database connections. Some other important features are foreign keys preloading, foreign key tags, copy query and log, table information and Order by. It comes with simple and easy to use GUI.