SchemaCrawler Alternatives
SchemaCrawler is described as 'open-source Java API that makes working with database metadata as easy as working with plain old Java objects' and is an app. There are three alternatives to SchemaCrawler for Windows, Linux and Mac. The best alternative is DbSchema. It's not free, so if you're looking for a free alternative, you could try SchemaSpy or Dataedo.
DbSchema is a visual database design & management tool. It can connect to any SQL, NoSQL or Cloud database via JDBC drivers. The tool includes features such as Relational Data Browse, Visual Query Builder, Interactive Layouts, Data Generator and more.
SchemaSpy is a Java-based tool (requires Java 5 or higher) that analyzes the metadata of a schema in a database and generates a visual representation of it in a browser-displayable format.
Documenting SQL Server, Oracle and MySQL databases made easy. Just import schema, describe anything and export to PDF, HTML or Excel.