Sommer is a very simple library for mapping Plain Old Java Objects (POJOs) to RDF graphs and back. Sommer stands for "Semantic Object (Metadata) MappeR".
Aperture is a Java framework for extracting and querying full-text content and metadata from various information systems (e.g. file systems, web sites, mail boxes) and the file formats (e.g. documents, images) occurring in these systems.
Metawidget takes your domain objects and automatically creates User Interface components for them, saving you handcoding your UIs and leaving you to concentrate on stitching together your application.
As much as possible, Metawidget does this without introducing new technologies. It inspects, at runtime, an application's existing back-end architecture (such as JavaBeans, annotations, XML configuration files) and creates components native to its existing front-end framework (such as Swing, Java Server Faces, Struts or Android).
Metawidget does not hide the power of your existing User Interface framework from you and guarantees that your investment in its technology and knowledge is as valid as always. The LGPL open source license allows the use of Metawidget in open source and commercial projects.
JAutodoc is an Eclipse Plugin for automatic adding Javadoc and file headers to your source code. It optionally generates initial comments from element name. Starting with Release 1.3 of JAutodoc it is possible to define Velocity templates for Javadoc and file headers.