Integrate Ivy in Eclipse with the IvyDE plugin.
Allows Eclipse to resolve project dependencies which are defined in your ivy.xml.

The Envers project makes it simple to version entities. The only thing required is annotating them with @Versioned. Storing historical data (versions) is completely transparent to the developer. He/she may interact with the entities as always.

Not only basic properties of an entity can be versioned, but also relations, making it possible to view parts of the database as they were at a given revision (each revision has an associated timestamp, one revision = one transaction, in which versioned data has changed)....

jOOQ effectively combines complex SQL, typesafety, source code generation, active records, stored procedures, advanced data types, and Java in a fluent, intuitive DSL.

JWPL (Java Wikipedia Library) is a free, Java-based application programming interface that allows to access all information contained in Wikipedia.

Commons Math is a library of lightweight, self-contained mathematics and statistics components addressing the most common problems not available in the Java programming language or Commons Lang.

It provides implementations of major mathematical algorithms concerning statistics, linear algebra, differential equations, optimization, root finding ......

Eclipse-based JasperReports Designer,

Configurable tool which allows Java applications to be installed and controlled like native NT or Unix services. Includes fault correction software to automatically restart crashed or frozen JVMs.

Data Visualization Library for Java. (Graphs, charts, tables, etc.),

Qt is the de facto standard C++ framework for high performance cross-platform software development. Qt Jambi is the Qt library made available to Java. It is an open source technology aimed at all desktop programmers wanting to write rich GUI clients using the Java language, while at the same time taking advantage of Qt’s power and efficiency....

RSF is a web programming framework. It has roughly the same scope as Sun's JSF, taking responsibility for the entire request processing cycle through HTTP request decoding, maintaining a bean model, invoking actions, directing errors, intepreting results and rendering views....