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Open DBDiff - A database comparison tool for Microsoft SQL Server 2005+ that reports schema differences and...
Fieldbook - Create a database, as easily as a spreadsheet
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
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
TiCodeX SQL Schema Compare - SQL Schema Compare supports Database schema compare for MS-SQL, mySQL and Postgres and runs on Windows, Linux and MacOS