DBeaver is free universal database tool for developers and database administrators. DBeaver is multi-platform, and is based on open source framework. It allows writing various extensions, supports any database which has JDBC driver, and may handle any external data source which may or may not have a JDBC driver. DBeaver is a GUI program that allows you to view the structure of a database, execute SQL queries and scripts, browse and export table data, handle BLOB/CLOB values, modify database meta objects, etc.
For more information on Dbeaver, see http://dbeaver.jkiss.org/