Open DBDiff - A database comparison tool for Microsoft SQL Server 2005+ that reports schema differences and...
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
MssqlMerge - MssqlMerge is an easy to use diff & merge tool for Microsoft SQL Server databases.
Replicator - Easily replicate database table data - even with heterogeneous 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
DataWeigher - The DataWeigher is the tool to compare and synchronize data.