Postgresql AutoDoc is a utility which will run through PostgreSQL system tables and returns HTML, DOT, and 2 styles of XML which describes the database.
KSqlAnalyzer is a tool for easy accessing the data of a MS-SQL-Database. The functionality and the look&feel are similar to the program 'SQL-Query-Analyzer' written by Microsoft.
AQueryx is a cross-platform and cross-backend interactive query tool. The users of it are mostly database developers and administrators who need to quickly hand-code many SQL queries, modify database structure and query table data.
Goal of oraschemadoc is "JavaDoc" style detailed documentation for all objects in schema covering Oracle specific features. Result of execution of oraschemadoc is set of static html files. There are more features under development...
Another PostgreSQL Diff Tool (also known as apgdiff) is free PostgreSQL diff tool that is useful for comparison/diffing of database schemas. The tool compares two database dump files and creates output with DDL statements that can be used to update old database schema to new one or to see in what both databases differ.