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.
KOJAC is a set of Java classes implementing optical elements and optics laws in order to build and simulate optical systems. It is also aimed at being a demonstrator of optics for educational purposes. Optical systems are composed of objects with defined properties that may be modified by the user through the applet's buttons and scrollbars. Such basic devices are lenses, apertures, interfaces, and may be themselves composite sets of other elements. KOJAC is able to do exact raytracing in 3 dimensions, taking into account the wavelength of the rays, and simulating real materials.
OpenMap is a JavaBeans-based GIS toolkit for building applications and applets needing geographic information. Using OpenMap components, you can access data from legacy applications, in-place, in a distributed setting. At its core, OpenMap is a set of Swing components that understand geographic coordinates. These components help you show map data, and help you handle user input events to manipulate that data.
XMLCoDe is a Java implementation of an XML Coder/Decoder. It provides tools for easily and automatically serializing/deserializing Java objects to/from XML strings or streams. It provides a way to easily implement an XML persistent object model. It features support for a scheme for accessors methods use, support for an advanced inheritance scheme, native support for array, vector, and hashtable data structures, an extensible package (support for more complex data structures through quick and efficient accessors use), and much more.