xSQL Documenter is a comprehensive, uniform, and easily navigable database documentation for all your applications. xSQL Documenter is able to generate documentation in both HTML and CHM formats.
Supports SQL Server 2000/2005, Analysis Server 2005, Oracle 9i and above, DB2 8.2 and above, MySQL 5.0 and above, Sybase ASE 12.0 and above, Informix IDS 10.0 and above, PostgreSQL 8.0 and above, Access 97 and above, VistaDB 3.0 and above, ENEA Polyhedra 7.0 and above
All objects supported - database properties, server properties and configuration, tables, views, stored procedures, user defined functions, user defined types, triggers, indexes, primary/foreign key relationships, constraints, schemas, assemblies, symmetric and asymmetric keys, certificates, xml schema collections, synonyms, dependencies between all objects
Generates HTML format which is useful for publishing your documents on an intranet site, and CHM format is useful if you want a single, compact, indexed and easily searchable file containing all your documentation about one or more databases.
Can run as a console application, useful for automating the process of generating documentation for you databases on a schedule, or for integrating xSQL Documenter into your development process.
Generates dependency and primary/foreign key graphs in VML. Such diagrams are much easier to understand at a glance than a flat list of dependent objects.
Allows you to easily add your own branding logo to each page in the documentation.
DDL/XMLA code - shows DDL/XMLA code for all objects documented
Include external objects such as COM objects, web services, web pages, or scripts in the documentation.
Creates data model diagrams where any database object (or external object) can be represented.
Allows you to specify an exclusion list so that certain objects can be excluded from the documentation.
Documnet object permissions
Generate a call graph for stored procedures and user defined functions (UDFs) that call other stored procedures and UDFs

The license of this software is Free Trial Software, the price is $199, you can free download and get a free trial.