LiveDoco - your database IS your documentation!
What LiveDoco is:

Microsoft SQL Server database documentation tool
Extended properties editor
Database structure explorer
Database structure export tool
What it can do:

LiveDoco enables easy access to your Microsoft SQL Server metadata/structure
and allows to:

View the structure of your database, including object descriptions and source code.
View and edit or delete extended properties, both standard MS_Description and custom ones.
Search database object names and extended properties
Selectively export your database metadata/structure:
As XML with an optional XSLT transformation
As SQL extended properties export script
Export subsystem is extendable so you can add your own export templates using either XSLT or ASP.NET MVC Razor syntax.

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