Apache Druid: a high performance real-time analytics database.

The world's fastest open query engine for sub-second analytics both on and off the data lakehouse. With the flexibility to support nearly any scenario, StarRocks provides best-in-class performance …

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.

Replicate your Key Value Store across your network, with consistency, persistance and performance.

A port of Snappy, LZO, LZ4, and Zstandard to Java

Java library for efficiently working with flat heap memory