Core Jackson processing abstractions (aka Streaming API), implementation for JSON

General data-binding functionality for Jackson: works on core streaming API

Spring Data makes it easy to use data access technologies, relational and non-relational databases, map-reduce ...

Spring Statemachine Core

Spring State Machine Kryo

Fast, efficient Java serialization. This is the main Kryo artifact.

Implementation for Apache Log4J, a highly configurable logging tool that focuses on performance and low garbage ...

All of the recipes listed on the ZooKeeper recipes doc (except two phase commit).

Unit testing utilities.

EMF Common

EMF Ecore

EMF XML/XMI Persistence

Java(TM) Persistence API

UML2 UML Model

UML2 Types Model

UML2 Common

Framework to develop full featured command-line/shell applications based on annotations.