Microsoft Assessment and Planning (MAP) is a powerful tool to inventorize, assess and report your IT asset inventory. The new version, MAP 5.5 has new features that automates discovery of heterogeneous database instances for migration to SQL Server. The tool provides network inventory reporting for MySQL, Oracle and Sybase instances in your environment. Once you discover those instance, you can use SSMA to migrate.
Learn more about MAP Toolkit here and request for MAP Toolking 5.5 Beta participation from here.