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Open DBDiff - A database comparison tool for Microsoft SQL Server 2005+ that reports schema differences and...
DBConvert for Excel and MySQL - Database migration tool for Excel to MySQL.
MssqlMerge - MssqlMerge is an easy to use diff & merge tool for Microsoft SQL Server databases.
TiCodeX SQL Schema Compare - SQL Schema Compare supports Database schema compare for MS-SQL, mySQL and Postgres and runs on Windows, Linux and MacOS
Redgate SQL Data Compare - Use Redgate SQL Data Compare to compare and synchronize static, lookup, and reference data in your SQL Server database - try it free
Replicator - Easily replicate database table data - even with heterogeneous databases.