JXFire is a Multi-User Dungeon game written in Java. It is using the Sun Gaming Server (aka "Project Darkstar") framework. JXFire aims at testing various game mechanisms rarely used, like uncertainty in gaming data perception, self-organizing ecological systems, or non-instantaneous information propagation.
DIY Zoning is a set of tools and instructions for controlling a state-of-the-art HVAC (Heating, Ventilation, and Air Conditioning) system. It covers airflow balancing, temperature control and zoning, energy conservation measures, remote access, 1-wire devices, and home automation.
Jukebox is a collection of reusable components that allow you to create a flexible server-side and middleware framework. It features semaphores and services (not quite your usual set), a Finite State Machine implementation based on Generics, a Datastream framework (data producers, consumers and loggers), and a JDK 1.6 compliant JMX framework based on Annotations.
JRecord allows you to read legacy, fixed width, and delimited flat files in Java. Files are interpreted via a Record-Layout (file description), which can be COBOL, XML, or CSV. The package provides an editor to edit files using the record layout, a wizard to build XML layouts from a files contents, and a formatted file compare that uses the layout in the compare process.
gSplit is a tool that allows you to split and assemble any files you want. It can be used to split big files to be able to store them on different devices. After assembling the different parts of a file, you can then check the file integrity to determine whether everything is now ready to use.
allspice is a set of Java libraries that allow you to define and implement a language that runs on top of the JVM. The packages define a YACC-like grammar and an underlying high level programming abstraction. One need never know about JVM internals to implement a new language. In addition, these compilations can be "on the fly". You can compile and execute without an intermediate class file.