SymmetricDS - SymmetricDS is an asynchronous database replication software package that supports multiple subscribers and bi-directional synchronization.
DBConvert Studio - Database migration/ sync software for data conversion and replication.
Timextender - Make quality business decisions with data, mind and heart
Full Convert - Full Convert is industry standard for database migration. Supports 40 database formats and offers unparalleled speed and customization.
Magento 2 Conflict Detector - Conflict Detection Tool
ESF Database Migration Toolkit - ESF Database Migration Toolkit enables transfer of data between various database formats without writing any scripts.