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Open DBDiff - A database comparison tool for Microsoft SQL Server 2005+ that reports schema differences and...
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
a7 SqlTools - Tools for MS Sql management with search, explore and comparison functionality.
Fieldbook - Create a database, as easily as a spreadsheet
DBComparer - Free Compare database tool - DBComparer 3.0 is a professional compare database tool for comparing Microsoft SQL Server 2008 (and 2005) database structure.