Redis embedded server

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a model-based, database access wrapper for JDBC

Hazelcast is a unified real-time data platform combining stream processing with a fast data store, allowing customers to act instantly on data-in-motion for real-time insights.

JUI provide all kinds of UI components that are used in web pages. However, charts and grids are not included.

MapDB provides concurrent Maps, Sets and Queues backed by disk storage or off-heap-memory. It is a fast and easy to use embedded Java database engine.