Data catalogs

List of data catalogs tools

Business Glossary tools

List of tools that help build, maintain an share business glossaries.

Database design tools

List of tools that allow for the design of a database.

Database diagram / Reverse Engineering tools

List of database ER diagram (ERD) / schema visualization / reverse engineering tools for popular databases.

Database documentation generators

List of tools that automatically generate documentation for your database. For more advanced capabilities see Database Documentation Tools

Database documentation tools

List of tools that allow the documentation (e.g. with descriptions) of schema of your databases.

Metadata Management tools

List of metadata management tools

Schema compare tools

List of database schema compare and synchronization tools.

Version control tools

List of source version control tools for databases.
State-based tools - generate the scripts for database upgrade by comparing database structure to the model (etalon).
Migration-based tools - help/assist creation of migration scripts for moving database from one version to next.