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PostgreSQL is a powerful, open source object-relational database system.
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Amazon DynamoDB is a fast and flexible NoSQL database service for all applications that need consistent, single-digit millisecond latency at any scale. It is a fully managed cloud database and supports both document and key-value store models.
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DbModeller is a web application which allows you to design your database schema without writing SQL.
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Visual schema diffs comparison and deployment tool.
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An enhanced, drop-in replacement for MySQL.
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Open-source software for reliable, scalable, distributed computing.