Oxygen Persistence Framework (http://oxygen.io) - highly flexible, high performance, layered object relational mapping framework with clustered loading, oosql and pluggable feature architecture. It is used in large projects already.
Raistlin is a fork of the "retired" Apache Merlin/Avalon projects. Raistlin is a Service Oriented Architecture (SOA) container built upon the Java platform providing common features such as logging, dependency management, configuration, and deployment.
SATIN is a component model for mobile systems. It is a research project, and allows systems to adapt by a) Reasoning about what they can currently do b) send and recieve classes, objects, components and data. It is used in a number of projects.
Essentially, TASH is a Java web application that makes use of the Springframework, the Tapestry web application framework, Acegi Security and Hibernate. It's a template application, that may prove useful when starting your own web projects.
OlsenRoutes is a software environment with a powerful difference. It provides online users with a library of statistical tools and access to Olsen's database (1985 through today) of tick-by-tick foreign exchange trading prices.
The aim of this project is to develop a Java web based application to track projects with rapidly changing or highly emergent requirements using scrum as an agile process for developing software.
M3Actions is a framework to define operational semantics in MOF metamodels. It provides a graphical action language to define model behaviour, a simulator, debugger and execution trace recorder, build on top of eclipse modeling projects (EMP).