Jaybird is a JCA/JDBC driver suite for the Firebird database server. Jaybird is developed as a pure Java implementation of the wire protocol, but also includes support for the native client-libraries and embedded Firebird (also through native libraries).
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Cernunnos embodies software industry best practices based on innovative design principals. It dramatically reduces time and effort in Java development by effectively promoting reuse in common programming tasks.

The Cernunnos Project is hosted by Google Code and is available freely under the Apache License, Version 2.0....

Phex is a cross-platform P2P filesharing client which is based on the Gnutella network.

It offers advanced functions and integrates all common Gnutella extensions like

• the Download Mesh and Partial File Sharing for decentral swarming downloads from multiple sources ...

Google Refine is a power tool that allows you to load data, understand it, clean it up, reconcile it internally, and augment it with data coming from external sources, such as Freebase. All within the comfort and privacy of your own computer.

In 2012 the project was renamed to OpenRefine: https://www.ohloh.net/p/openrefine...

OWASP ESAPI for Java: Strong, Simple Security Controls for Java Developers

Don’t write your own security controls! Reinventing the wheel when it comes to developing security controls for every web application or web service leads to wasted time and massive security holes. The OWASP Enterprise Security API (ESAPI) Toolkits help software developers guard against security‐related design and implementation flaws. ...

SMC - the State Machine Compiler

SMC takes a state machine stored in a .sm file and generates a State pattern in fourteen programming languages (C, C++, C#, [incr Tcl], Groovy, Java, Lua, Objective-C, Perl, PHP, Python, Ruby, Scala, VB.net). Includes: default transitions, transition args, transition guards, push/pop transitions and Entry/Exit actions....

visural-wicket is a useful set of light-weight, loosely coupled components and utilities for the Apache Wicket web framework.

Each component is designed to be easily integrated into any existing Wicket application with minimal dependencies.

Each component is also designed to be easily customised to fit a particular system's requirements....

JAMwiki is a state-of-the-art reimplementation of Mediawiki in Java (servlet 2.3 and Java 1.5 compatibility). It can be run with or without a database and is designed to be fast and easy to set up.

JAM is not the same implementation but supports most of MediaWiki syntax, including advanced constructs like templates. It runs inside Apache Tomcat, Glassfish or similar server....

Daisy Diff is a Java library that diffs (compares) HTML files.
Added and removed words are highlighted and changes to the styling are annotated.

This project was a Google Summer of Code project for DaisyCMS.

Features

• Works with badly formed HTML that can be found "in the wild"....

jPOS is a Java® platform-based, mission-critical financial transaction library/framework that can be customized and extended in order to implement financial interchanges.

jPOS Extended Edition Software Development Kit goes one step beyond jPOS by providing a development environment with a growing set of proven, ready-to-deploy components based on jPOS' best practices....