SQuirreL SQL Client is a free and open source database management application for Windows, MacOS and Linux. It supports JDBC compliant databases like MySQL, PostgreSQL, MariaDB, and SQLite. Using this you can browse the data in database tables and run SQL commands. It is written in Java and released under the GNU Lesser General Public License. Some of the important features are build-in SQL editor with code completion, graph support, syntax highlighting and abbreviations, SQL Script and SQL bookmarks support. You can also extend its features using plugins.