Testcontainers is a Java library that supports JUnit tests, providing lightweight, throwaway instances of common databases, Selenium web browsers, or anything else that can run in a Docker container.

ZIO — A type-safe, composable library for async and concurrent programming in Scala

Protocol Buffers - Google's data interchange format

A testing tool for Scala and Java developers

a gradle plugin for the scala mima tool to check binary compatibility. https://github.com/lightbend/mima, for maven https://github.com/kelnos/mima-maven-plugin

A scala library to write Http apps.

https://openjdk.org/projects/code-tools/jmh

ScyllaDB Java Driver for ScyllaDB and Apache Cassandra, based on the DataStax Java Driver

A library that provides an in-memory Kafka instance to run your tests against.

Benchmarking Object Pool Implementations

High Performance Inter-Thread Messaging Library

Type-safe, composable SQL for ZIO applications

Gradle plugin to create fat/uber JARs, apply file transforms, and relocate packages for applications and libraries. Gradle version of Maven's Shade plugin.

Very spicy additions to the Java programming language.

Jackson project that contains various collection-oriented datatype libraries: Eclipse Collections, Guava, HPPC, PCollections

JNI binding for Zstd

fastutil extends the Java™ Collections Framework by providing type-specific maps, sets, lists and queues.

DataStax Spark Cassandra Connector

Lightweight, modular, and extensible library for functional programming.

Writing Fast Parsers Fast in Scala

Gradle release & version management plugin.

command line options parsing for Scala

Mirror of Apache Logging Log4J2