prerex is an interactive (command-line) editor and a LaTeX macro support package that can be used to create very attractive and readable prerequisite charts. A graphical front-end for the editor also provides a prerex-enabled PDF viewer. A prerequisite chart is a network of course boxes linked by prerequisite and co-requisite arrows.
The 'expp' tool (the Epeios XML preprocessor) reads an XML file to transform it to another XML file. It simplifies the writing of XML files by allowing the handling of macros, the definition and testing of variables, the inclusion of files, and more. This is done by writing, directly in the source XML file, predefined tags owned by a given namespace, tags which are then recognized and handled by the 'expp' tool. The tool is also available as a Java native component.
Keystone is a cross-platform, object oriented application framework which allows applications to be written to build on the target platforms of GNU/Linux and Win32 without modification of their source. Keystone implements several modern Web standards, including SVG graphics and the XUL user interface description language.
XMLToaster is a tool for extracting and loading XML from databases. It provides a modified version of SQL which has XML mapping extenstions. It can be compared to the "for xml" command in MS SQL Server 2008, but it runs on all common databases and scales to handle very large XML mappings without too much complexity. It is used as a Java library to write XML interfaces, but can also be run as a command line tool.
The Epeios MIDI to XML converter makes it possible to convert binary MIDI files to a format that allows them to be handled effectively with tools like CVS. If you put, using your favorite MIDI sequencer, the CVS '$Id$' tag (or other CVS tags) in the comment tag of the MIDI file, the changes made to this tag by CVS are propagated into the MIDI file.