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Retable is an online spreadsheet solution which helps you to organize, display, share and edit spreadsheets easily and convert them to a database.
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SignalDB is a reactive, local-first JavaScript database designed for modern web applications. It combines signal-based reactivity with powerful local data management and real-time synchronization capabilities.
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Redis is an open source in-memory data structure project implementing a distributed, in-memory key-value database with optional durability.
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PostgreSQL is a powerful, open source object-relational database system.
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MongoDB (from "humongous") is a scalable, high-performance NoSQL database.
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Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.