gitSQL - Database source control for SQL Server, PostgreSQL
dbForge SQL Complete - Try Intellisense functionality and Improved SQL Formatter in SQL Server Management Studio and Visual Studio using SQL Complete!
SQL Source Control - Source control schemas and reference data, roll back changes, and maintain the referential...
Dataedo - Database documentation tool
Flyway - Flyway is a database migration tool.
SQL Doc by Red Gate - Document your databases automatically.