Simple Log is a small library that does logging very simply and requires you to do almost nothing (other than actually logging) to get log output to happen. It is much simpler to use than a logging framework, especially in terms of configuration. It doesn't attempt to solve every logging problem in one package, but contains enough features to be a viable alternative for most applications that need logging. This tool will handle the logging needs of most small- to large-sized projects, but with an almost non-existent learning curve.
Construct is a framework for command processing. It is based on a request/response cycle managed by a Controller. It has support for filters, filter chains, and command chaining. The controller has two modes for request processing: synchronous and asynchronous. Validators (commons-validator) are also supported.
Wicket is a Java Web application framework implementing simplicity, separation of concerns, and ease of development. Wicket pages can be mocked up, previewed, and later revised using standard WYSIWYG HTML design tools. Dynamic content processing and form handling is all handled in Java code using a component model backed by POJO data beans that can easily be persisted using your favourite technology.
Pulga is a program for numerical simulation of dynamical systems. It is designed to provide a way for students and researchers who study dynamical systems to model them on a computer and analyze them numerically without the difficulty of traditional computer programming languages.
SIOX4Java (Simple Interactive Object Extraction) is a Java SDK that provides a generic segmentation engine for extracting the foreground from still images with little user interaction. The underlying method (which has also been integrated into GIMP) is noise and motion blur robust and can easily be adapted for the segmentation of objects in videos. The SDK also contains an experimental feature called the "Detail Refinement Brush", which enables the removal of spill colors and manual refinement of highly detailed textures.