Apache Cayenne

Apache Cayenne is an open source persistence framework licensed under the Apache License, providing object-relational mapping (ORM) and remoting services.

Apache Cayenne is available for download at http://cayenne.apache.org/.

Apache Flood

Flood is a profile-driven HTTP load tester. It can be used to gather important performance metrics for your website.

Apache Flood is available under the Apache license for download at http://apache.oc1.mirrors.redwire.net/.

Apache Jakarta Commons Logging

Jakarta Commons Logging is a thin bridging API for logging with adapters for many common logging systems.

Jakarta Commons Logging is available under the Apache license for download at http://jakarta.apache.org/.

Apache James

The Apache Java Enterprise Mail Server (a.k.a. Apache James) is a 100% pure Java SMTP and POP3 Mail server and NNTP News server.

Apache James is available under the Apache license for download at download at http://james.apache.org/.

Apache JMeter

JMeter is a 100% pure Java desktop application designed to load test functional behavior and measure performance.

Apache JMeter is available under the Apache license for download at http://jakarta.apache.org/.

Apache log4j

Log4j is a fast and flexible framework for logging application debugging messages. With log4j it is possible to enable logging at runtime without modifying the application binary. The log4j package is designed so that these statements can remain in shipped code without incurring a heavy performance cost. Logging behavior can be controlled by editing a configuration file, without touching the application binary.

Log4j is available under the Apache license for download at http://logging.apache.org/.

Apache Lucene

Lucene is a high-performance, full-featured text search engine library written entirely in Java. It is a technology suitable for nearly any application that requires full-text search, especially cross-platform.

Apache Lucene is available under the Apache license for download at http://www.apache.org/.

Apache OpenJPA

Apache OpenJPA is a Java EE persistence project of the Apache Software Foundation. It is a feature-rich implementation of the persistence part of Enterprise Java Beans 3.0, also known as the Java Persistence API (JPA), and is available under the terms of the Apache Software License.

Apache OpenJPA is available for download at http://openjpa.apache.org/.

Apache Roller

Apache Roller is a full-featured, multi-user and group-blog server from the Apache Software Foundation suitable for blog sites large and small. Roller is a stable and production-ready blog server that powers external and internal blogs.

Apache Roller is available for download at http://roller.apache.org/.

Apache ServiceMix

Apache ServiceMix is an Open Source ESB (Enterprise Service Bus) that combines the functionality of a Service Oriented Architecture (SOA) and an Event Driven Architecture (EDA) to create an agile, enterprise ESB.

Apache Struts

Struts is a free open-source framework for creating Java Web applications.

Struts is available under the Apache license for download at http://struts.apache.org/.

Apache Xalan

The Apache Xalan Project is a collaborative software development project dedicated to providing robust, full-featured, commercial-quality, and freely available XSLT support on a wide variety of platforms. There are currently two subprojects under the Apache Xalan Project: Xalan C++, and Xalan Java, representing C++ and Java implementations.

Apache Xalan C++ is available under the Apache license for download at http://xml.apache.org; Xalan Java at http://xml.apache.org/.

Apache Xerces

Xerces is a collaborative software development project dedicated to providing robust, full-featured, commercial-quality, and freely available XML parsers and closely related technologies on a wide variety of platforms supporting several languages.

Apache Xerces is available under the Apache license for download at http://xml.apache.org/.

mod_aspdotnet

mod_aspdotnet is a loadable Apache 2 module for serving ASP.NET content using the Microsoft ASP.NET hosting and CLR environment within the Apache HTTP Server process.

Originally developed by Covalent, mod_aspdotnet has been made freely available under the Apache license for download at http://sourceforge.net/projects/mod-aspdotnet/.

OpenLDAP

OpenLDAP Software is an open source implementation of the Lightweight Directory Access Protocol. OpenLDAP is released under its own license called the OpenLDAP Public License and available for download at http://www.openldap.org/.

OpenSSL

The OpenSSL Project is a collaborative effort to develop a robust, commercial-grade, full-featured, and Open Source toolkit implementing the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols as well as a full-strength general purpose cryptography library.

The OpenSSL toolkit is licensed under a Apache-style licence and is available for download at http://www.openssl.org/.