phpMyAdmin is a tool intended to handle the administration of MySQL over the Web. It can create, rename, and drop databases, create/drop/alter tables, delete/edit/add fields, execute any SQL statement, manage keys on fields, create dumps of tables and databases, export/import CSV data, and administrate one single database and multiple MySQL servers.
DbWrench is multi-vendor, multi-platform database design and synchronization software. Features include a syntax highlighting SQL query editor, support for many of today's most popular databases, a graphic entity relation diagram (ERD) designer, and the ability to forward and reverse engineer databases. Its multi-vendor and multi-platform functionality makes it ideal for heterogeneous database environments.
Jailer is a database subsetting and browsing tool. It is a tool for data exporting, schema browsing, and rendering. It exports consistent, referentially intact row-sets from relational databases. It removes obsolete data without violating integrity. It is DBMS agnostic (by using JDBC), platform independent, and generates DbUnit datasets, hierarchically structured XML, and topologically sorted SQL-DML.
Talend Open Studio for Data Quality helps you to profile your data. The ergonomic interface allows you to define metrics (indicators) and collect statistics on your data in a few clicks. It comes with a set of regular expressions that helps you to identify bad data. You can create your own regular expressions and use them in data profiling analyses. A lot of options exist for each indicator, which change the behavior of the indicator so that it gives you more pertinent information. Data quality options on indicators alert you when your data quality is not what you expected.