Quick tutorial on how to view and edit table and column comments with MySQL Workbench.
Database Tools Articles
Quick tutorial on viewing and editing table and column comments in free Oracle SQL Developer.
4 options you have to edit column descriptions in SSMS and 2 for describing tables.
A tutorial that shows how to document SQL Server database with Visual Studio and then export it to PDF and HTML.
Practical guide on creating ER diagrams with Microsoft SQL Server Management Studio (SSMS).
This tutorial will show you how to generate documentation of your Oracle database with free tool from Oracle – SQL Developer Data Modeler.
This article presents 8 different types of tools you can use to create a documentation of your existing databases.
A comparison between two database documentation tools - Dataedo and Redgate SQL Doc.
Probably most complete list of Data Dictionary tools on the web.