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ApexSQL Doc - ApexSQL Doc creates database documentation in a variety of formats.
dbForge SQL Complete - Try Intellisense functionality and Improved SQL Formatter in SQL Server Management Studio and Visual Studio using SQL Complete!
Dataedo - Database documentation tool
SQL Prompt - SQL Prompt Pro strips away the repetition of coding by making writing, formatting, and refactoring...
ApexSQL Complete - ApexSQL Complete can automatically fill in SQL keywords, statements and identifiers.
SQL Data Dictionary - Easily generate a PDF or HTML data dictionary from SQL Server with just a few clicks.