Google core libraries for Java

A high performance caching library for Java

Graphs for Everyone

Apache Doris is an easy-to-use, high performance and unified 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 …

A scalable, distributed Time Series Database.

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.

H2 is an embeddable RDBMS written in Java.

Maxwell's daemon, a mysql-to-json kafka producer

Micro second messaging that stores everything to disk

Open, Multi-modal Catalog for Data & AI

LakeSoul is an end-to-end, realtime and cloud native Lakehouse framework with fast data ingestion, concurrent update and incremental data analytics on cloud storages for both BI and AI applications.

Automated testing to find logic and performance bugs in database systems

Transactional schema-less embedded database used by JetBrains YouTrack and JetBrains Hub.

Apache GeaFlow: A Streaming Graph Computing Engine.

A cluster consistency platform

A fast, log structured key-value store.