A subset reimplementation of Apache Velocity with a much simpler API.

Mirror of Apache Commons SCXML

Apache Commons Jelly

Apache Commons JXPath

Jenetics - Genetic Algorithm, Genetic Programming, Evolutionary Algorithm, and Multi-objective Optimization

Apache Kylin

Eclipse Jetty® - Web Container & Clients - supports HTTP/2, HTTP/1.1, HTTP/1.0, websocket, servlets, and more

APM, Application Performance Monitoring System

Distributed database middleware

Java libraries for writing microservices

KSQL - a Streaming SQL Engine for Apache Kafka

An extensible multilanguage static code analyzer.

Mirror of Apache Commons Complex Numbers

Apache Dubbo (incubating) is a high-performance, java based, open source RPC framework.

Common utilities library containing metrics, config and utils

Mirror of Apache Commons Compress

Mirror of Apache Commons Collections

Sample iPython notebook with soccer predictions

Deep Learning for Java, Scala & Clojure on Hadoop & Spark With GPUs - From Skymind

Jenkins jira plugin

GraphJet is a real-time graph processing library.

Fast, Scientific and Numerical Computing for the JVM (NDArrays)

Mirror of Apache Commons Text

Mirror of Apache Jackrabbit Oak

Mirror of Apache Commons Imaging

Core part of Jackson that defines Streaming API as well as basic shared abstractions

Open source analytics and market risk library from OpenGamma

A library to create, read and validate ZUGFeRD compliant invoices. Availible for Java and .NET

Joda-Time is the widely used replacement for the Java date and time classes prior to Java SE 8.