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.
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.
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.
StupidZombie is a tool that can be used to "ping" several directories to notify then about a blog update. It does not need to be run from a Web page like Blogger or Wordpress. You can run StupidZombie from a cron job or using Java WebStart. Also, StupidZombie has a simple tag generator from directories that support it.
EasyGIS is a simple way to share and publish geographic data. It presents a number of core features that allow you to share and publish geographic localized data sets on the Web. It has a simple Web user interface for integration with external data and service providers to prepare so-called GIS mashups. Built-in support for Google Maps and OpenStreetMap serves as a good basement for thematic mapping. All system services are exposed via a RESTful API. With the REST Web resources, external clients can leverage the search and map rendering functionality, embedding the resources into external applications and sites.
DatabaseToUML reverse engineers a database schema from an existing relational JDBC database. Tables and fields are reversed to classes and attributes, constraints are reversed to association, and tables composed only of foreign keys are converted to many-to-many associations. The main idea is to reuse the reversed model in a generator, taking UML2.x (EMF XMI 2.0/2.1) models as input.