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Jam/MR (formerly "jam - make(1) redux"). Jam/MR is a build utility like make(1). It has its own expressive language which allows for portable Jamfiles capable of building large projects with multiple concurrent processes.

iText is a library that allows you to generate PDF files on the fly. The iText classes are very useful for people who need to generate read-only, platform independent documents containing text, lists, tables and images. The library is especially useful in combination with Java(TM) technology-based Servlets: The look and feel of HTML is browser dependent; with iText and PDF you can control exactly how your servlet's output will look.

The ivykis library is a thin, portable wrapper around OS-provided mechanisms such as epoll(4), kqueue(2), poll(2) and select(2). It was mainly designed for building high-performance network applications, but can be used in any event-driver application that uses pollable file descriptors as its event sources. Programs written to the ivykis API are generally single-threaded (or use only a small number of threads), and never block on I/O. All input and output is done in a nonblocking fashion, with I/O readiness notification delivered via callback functions.

Commons Configuration provides a generic configuration interface which enables an application to read configuration data from a variety of sources. Commons Configuration provides typed access to single, and multi-valued configuration parameters. Configuration parameters may be loaded from the following sources: * Properties files * XML documents * JNDI * JDBC Datasource Different configuration sources can be mixed using a ConfigurationFactory and CompositeConfiguration. Additional sources of configuration parameters can be created by using custom configuration objects. This customization can be achieved by extending AbstractConfiguration.

Commons IO is a library of utilities to assist with developing IO functionality. There are three main areas included: * Utility classes - with static methods to perform common tasks * Filters - various implementations of file filters * Streams - useful stream, reader and writer implementations

In a nutshell Jenkins CI is the leading open-source continuous integration server. Built with Java, it provides over 300 plugins to support building and testing virtually any project.