JFaceDbc -
http://jfacedbc.sourceforge.net by Andrea Mazzolini
JFaceDbc is a JDBC client that will allow you to view the structure of a JDBC compliant database, issuing SQL commands, etc. JFaceDbc can run as a stand-alone application or as an Eclipse plug-in. The main features are: SQL syntax highlighting; a database structure viewer; multiple connections management and internationalization. (See also SQLExplorer and Pratocity listings on this page!)
SQLExplorer -
https://sqlexplorer.dev.java.net/ - Alexandre Telles and Aadi Deshpande
SQLExplorer is a database query and visualization tool originally derived from JFaceDBC. It can connect and run queries against any JDBC-compliant database and comes with a schema visualizer to help you better understand your schema. The plugin was originally developed by Andrea Mazzolin and is now being maintained by Alexandre Telles and Aadi Deshpande.