dbForge SQL Complete - Try Intellisense functionality and Improved SQL Formatter in SQL Server Management Studio and Visual Studio using SQL Complete!

yuniql - Free and open source schema versioning and migration tool made with .NET Core. Plain SQL, arrange versions in ordinary folders and seed your data from CSV via stand-alone CLI (no CLR needed), Azure Pipelines, Docker or ASP.NET Core code.

SQL Doc by Red Gate - Document your databases automatically.

Flyway - Flyway is a database migration tool.

ApexSQL Complete - ApexSQL Complete can automatically fill in SQL keywords, statements and identifiers.

Liquibase - Database schema change management and release automation solution.