DB Designer - fabFORCE.net Database Tools
dbForge SQL Complete - Try Intellisense functionality and Improved SQL Formatter in SQL Server Management Studio and Visual Studio using SQL Complete!
Vertabelo - Online tool for visual database design.
ApexSQL Complete - ApexSQL Complete can automatically fill in SQL keywords, statements and identifiers.
Dataedo - Database documentation tool
ApexSQL Refactor - ApexSQL Refactor is a free SQL formatter and database refactoring tool for SQL Server.