Candidate List

Name: UltraESB
Home: http://adroitlogic.org/products/ultraesb.html
   UltraESB is a Free and Open Source Enterprise Service Bus

Name: Aardvark
Home: http://vark.github.io/
   A build tool based on the Apache Ant library and the Gosu language

Name: Vert.x
Home: http://vertx.io/
   Effortless asynchronous application development for the modern web and enterprise

Name: Groovy VFS
Home: https://github.com/ysb33r/groovy-vfs
   A DSL for Groovy on top of Apache VFS2

Name: Virgo
Home: http://www.eclipse.org/virgo/
   Virgo from EclipseRT is a completely module-based Java application server that is designed to run enterprise Java applications and Spring-powered applications with a high degree of flexibility and reliability. It offers a simple yet comprehensive platform to develop, deploy, and service enterprise Java applications.

Name: Voldemort
Home: http://www.project-voldemort.com/voldemort/
   Voldemort is a distributed key-value storage system

Name: WebGoat
Home: https://github.com/WebGoat/WebGoat
   WebGoat is a deliberately insecure web application maintained by OWASP designed to teach web application security lessons.

Name: Weblogic
Home: http://www.oracle.com/technetwork/middleware/weblogic/index.html
   Oracle WebLogic Server is the industry's best application server for building and deploying enterprise Java EE applications with support for new features for lowering cost of operations, improving performance, enhancing scalability and supporting the Oracle Applications portfolio.

Name: Weka
Home: http://www.cs.waikato.ac.nz/ml/weka/
   Weka is a collection of machine learning algorithms for data mining tasks. The algorithms can either be applied directly to a dataset or called from your own Java code. Weka contains tools for data pre-processing, classification, regression, clustering, association rules, and visualization. It is also well-suited for developing new machine learning schemes.

Name: WildFly
Home: http://www.wildfly.org/
   Application Server inherited from JBoss

Name: WLP
Home: https://www.ibm.com/developerworks/community/blogs/wasdev/entry/learn_wlp_v8500?lang=en
   IBM WebSphere Application Server Liberty Profile is a simplified, lightweight application serving environment.

Name: Apache Wookie
Home: http://wookie.apache.org/
   Apache Wookie is a Java server application that allows you to upload and deploy widgets for your applications; widgets can not only include all the usual kinds of mini-applications, badges, and gadgets, but also fully-collaborative applications such as chats, quizzes, and games.

Name: Spring XD
Home: http://www.springsource.org/spring-xd
   Spring XD is a unified, distributed, and extensible system for data ingestion, real time analytics, batch processing, and data export.

Name: XWiki
Home: http://www.xwiki.org/
   XWiki Enterprise is a professional wiki that has powerful extensibility features such as scripting in pages, plugins and a highly modular architecture.

Name: Zorka Collector
Home: http://zorka.io/
   Advanced and fully programmable open source monitoring agent for JVM.

Name: Zipkin
Home: http://zipkin.io/
   Zipkin is a distributed tracing system. It helps gather timing data needed to troubleshoot latency problems in microservice architectures. It manages both the collection and lookup of this data. Zipkinā€™s design is based on the Google Dapper paper.

Name: ZooKeeper
Home: http://zookeeper.apache.org/
   Apache ZooKeeper is an effort to develop and maintain an open-source server which enables highly reliable distributed coordination.

Name: Zorka Agent
Home: http://zorka.io/
   Advanced and fully programmable open source monitoring agent for JVM.

Name: Zuul
Home: https://www.azul.com/products/zulu/
   Zulu is an enterprise-grade, certified build of OpenJDK that can be deployed across various operating systems, containers, hypervisors and Cloud platforms.