Apache Calcite

Redisson

Redisson: Valkey & Redis Java Client and Real-Time Data Platform. Sync/Async/RxJava/Reactive API. Over 50 Valkey and Redis based Java objects and services: Set, Multimap, SortedSet, Map, List, Queue, Deque, Semaphore, Lock, AtomicLong, Map Reduce, Bloom filter, Spring, Tomcat, Scheduler, JCache API, Hibernate, RPC, local cache..

HikariCP

光 HikariCP・A solid, high-performance, JDBC connection pool at last.

ShardingSphere

Empowering Data Intelligence with Distributed SQL for Sharding, Scalability, and Security Across All Databases.

QuestDB

QuestDB is a high performance, open-source, time-series database