OSCore is a set of small utility classes that are useful in J2EE and even non-J2EE applications. Components include utilities to modify text, dates, primitive data, and XML. Also included is an EJB-compatible sequence generator that can easily be used by entity beans to provide unique IDs for primary keys.
OpenSymphony Workflow is a very flexible workflow system that can be plugged in to almost any need or existing application. Uses can range from document management to order processing to project management. It includes support for many different interface mechanisms (SOAP, EJB, Java Class) as well as persistence (EJB, JDBC, XMl, Ofbiz). It works in any J2EE container, including servlet containers (without EJB support).
WebWork MVC Framework is a Java pull HMVC Web application framework, designed for creating dynamic websites using minimal effort and maximum flexibility. It supports multiple views, allowing you to switch between different view technologies, including HTML, Swing, PDF, XSLT, and Velocity, without changing the logic producing the data. It includes a powerful expression language for navigating its object stack, as well as a small but complete tag library. It supports internationalization, redirection, error handling, validation, command driven actions, chaining actions, and type conversions.
XWork is a generic command pattern implementation and inversion of control (IoC) container. It is designed to be small, fast, and fit specifically for workflow-related usages, such as Web application frameworks and workflow engines. It provides the foundation for WebWork, a Java-based Web framework.