db4o is an object database for Java and all .NET environments. Its features include ACID transactions, automatic class schema recognition, query-by-example, a S.O.D.A. object querying API, native queries, LINQ support on .NET, callback methods, memory files, cascade-on-delete, multi-threaded access, and Java Webstart and servlet support.
Jmol is a Free, Open Source molecule viewer and editor. It is a collaboratively developed visualization and measurement tool for chemical scientists. Jmol is an active project, and there are new features being added to it on a daily basis. Users are encouraged to modify it to fit their needs and to contribute their changes to the project.
The Oculus Layout System supplies a Java layout API, and an easy-to-use visual builder, which works with both Swing and AWT. Main features include a proprietary stretching model, which enables the system to automatically infer how to properly stretch almost any user interface, and a cursor-based layout paradigm which dramatically improves the readability and maintainability of the layout code.