Huagati DBML/EDMX Tools is described as 'This add-in will save you many hours of precious development time by automating repetitive tasks: synchronize your Linq-to-SQL models with the underlying database and any database schema changes, mass-rename Linq-to-SQL and Entity Framework generated entity classes and their' and is an app in the Development category. There are 2 alternatives to Huagati DBML/EDMX Tools for Windows. The best alternative is LinqConnect Professional. It's not free, so if you're looking for a free alternative, you could try Entity Developer.
LinqConnect is a LINQ to SQL compatible ORM solution with extended functionality, support for SQL Server, Oracle, MySQL, PostgreSQL, and SQLite, its own visual model designer, seamlessly integrating to Visual Studio, and SQL monitoring tool.
Entity Developer is a powerful ORM designer for ADO.NET Entity Framework, NHibernate, LinqConnect, Telerik Data Access, and LINQ to SQL. You can use Model-First and Database-First approaches to design your ORM model and generate C# or Visual Basic .NET code for it.