Implementation for Apache Log4J, a highly configurable logging tool that focuses on performance and low garbage generation. It has a plugin architecture that makes it extensible and supports asynchronous logging based on LMAX Disruptor.

Core package for the JUnit Jupiter test engine.

Apache Commons Logging is a thin adapter allowing configurable bridging to other, well-known logging systems.

The Apache Log4j SLF4J API binding to Log4j 2 Core

A thin layer on top of JUnit 4 to allow running vintage tests (based on JUnit 3.8 and JUnit 4) with the JUnit Platform launcher infrastructure.

Spring Boot makes it easy to create stand-alone, production-grade Spring based Applications that you can 'just run'. It takes an opinionated view of the Spring platform and third-party libraries so you can get started with minimum configuration.

HikariCP is a 'zero-overhead' production ready JDBC connection pool.

Hibernate's Jakarta Validation reference implementation.

Spark SQL is Apache Spark's module for working with structured data based on DataFrames.

Jedis is a blazingly small and sane Redis java client.

Core libraries for Apache Spark, a unified analytics engine for large-scale data processing.