Historical Event Markup and Linking Project (Heml) provides an XML schema for historical events and a Java Web app which transforms conforming documents into hyperlinked timelines, maps and tables. It aims to provide a most information-rich interchange format for historical data, and thus add a historical component to the growing movement for a 'Semantic Web.'
The Big Faceless Graph Library is a Java class library for creating graphs and charts. It is backed by a full 3D engine, allowing you to create shaded 3D pie, bar, and line graphs as GIF, PDF, PNG, or other image formats. Its features include transparent backgrounds, extensible axes to graph dates, currencies, custom fonts, and spline curve fitting. It is small, fast, and easy to use.
The Monkey Boy Graph is a Java class that accepts arrays of data and creates graphs to represent the data. It can create many different types of graphs, including pie, line, 3d bar, bar, and scatterplots. The graphs are saved as JPEG images. Lots of customization options are available, including font types, sizes, and colors.