Open Source Java Clustering Software for Windows

JPPF makes it easy to parallelize computationally intensive tasks and execute them on a Grid.

Alternative implementation of Spring framework remoting subsystem that supports different schemes of remote communication between client and server (1-1, 1-many, dynamic services discovering).

Essence is a simple Java framework with modules for Quantitative Analysis and Distributed Data systems.

This is a distributed index framework using Apache Hadoop, Apache Lucene and Apache Tika, to index large volume of data.

JACOB stands for [J]ava [A]gent [C]ontainer [OB]jects. Its purpose is to provide a framerwork for developing Agent Applications (by plugins). Applicability in the domain of distributed computing, decentralized job scheduling and simple P2P frameworks.

JAmba is a simple JMS queue routing service. The service allows JMS messages to be passed between local and networked JMS queues through jgroups.

OpenRDS (Open Requisition Distribution System) is a framework written in Java/RMI conceived for making requisition-based distributed systems (clustering) easy to develop/manage. It's design emphasizes robustness, simplicity and scalability.

Pythia is an open source highly scalable standards-based cache for Java. Pythia provides, lightning-fast speed, fail-safe operations, persistence, transactionality, dynamic scaling, out of Heap caching, extreme ease of use

Provides distributed method invocation capabilities to regular Java classes with limited or no extra work for the developer. The workload is balanced over participating machines. Java API, Anders Björklund

As of now, you can get Ehcache only from ehcache.org or Maven central. A simple, fast, thread safe, standards based cache for Java, and provides memory and disk stores and distributed operation for clusters. ehcache is widely used in such open source projects as Hibernate and Spring. Terracotta offers enterprise edition