DOC xPress is described as 'produces complete documentation for SQL Server instances. In addition, it enables documentation for Analysis Services (SSAS), Integration Services (SSIS) and Reporting Services (SSRS)' and is an app in the Development category. There are five alternatives to DOC xPress for Windows. The best alternative is SQL Data Dictionary. It's not free, so if you're looking for a free alternative, you could try Database Note Taker. Other great apps like DOC xPress are ApexSQL Doc (Paid), SQL Doc by Red Gate (Paid) and SSIS Documenter (Paid).
Now FREE. A simple and powerful database documentation tool for sql server and mysql databases. It shows all your tables and fields, highlights the documentation status of each, and allows export (via XSL) to share. Supports markdown syntax.
SSIS Documenter integrates into the SQL Server 2005 Business Intelligence Studio. Once you have installed SSIS Documenter you will see a "Generate Documentation" menu item availabel for all SSIS packages.