DBComparer!

dbForge Schema Compare for SQL Server is a reliable, easy-to-use tool for comparing and synchronizing Microsoft SQL Server database schemas. This product is specially designed to help you compare your SQL Server databases, analyze differences and synchronize your schemas using generated SQL script in a well-designed user interface quickly and without errors.

A sql management tool which allow to search and explore databases and compare the structure and data of them.

Open DBDiff is an open source database schema comparison tool for SQL Server 2005+. It reports differences between two database schemas and provides a synchronization script to upgrade a database from one to the other.

SQL Compare, by Red Gate Software, compares and synchronizes SQL Server databases, automates comparisons, and helps you manage database versioning issues